Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 1 | /* |
Dave Jones | f3a03b0 | 2007-07-16 11:23:03 -0400 | [diff] [blame] | 2 | * libata-sff.c - helper library for PCI IDE BMDMA |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 3 | * |
| 4 | * Maintained by: Jeff Garzik <jgarzik@pobox.com> |
| 5 | * Please ALWAYS copy linux-ide@vger.kernel.org |
| 6 | * on emails. |
| 7 | * |
| 8 | * Copyright 2003-2006 Red Hat, Inc. All rights reserved. |
| 9 | * Copyright 2003-2006 Jeff Garzik |
| 10 | * |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2, or (at your option) |
| 15 | * any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; see the file COPYING. If not, write to |
| 24 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
| 26 | * |
| 27 | * libata documentation is available via 'make {ps|pdf}docs', |
| 28 | * as Documentation/DocBook/libata.* |
| 29 | * |
| 30 | * Hardware documentation available from http://www.t13.org/ and |
| 31 | * http://www.sata-io.org/ |
| 32 | * |
| 33 | */ |
| 34 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 35 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/gfp.h> |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 37 | #include <linux/pci.h> |
Paul Gortmaker | bff7832 | 2011-07-03 13:41:29 -0400 | [diff] [blame] | 38 | #include <linux/module.h> |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 39 | #include <linux/libata.h> |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 40 | #include <linux/highmem.h> |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 41 | |
| 42 | #include "libata.h" |
| 43 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 44 | static struct workqueue_struct *ata_sff_wq; |
| 45 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 46 | const struct ata_port_operations ata_sff_port_ops = { |
| 47 | .inherits = &ata_base_port_ops, |
| 48 | |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 49 | .qc_prep = ata_noop_qc_prep, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 50 | .qc_issue = ata_sff_qc_issue, |
Tejun Heo | 4c9bf4e | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 51 | .qc_fill_rtf = ata_sff_qc_fill_rtf, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 52 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 53 | .freeze = ata_sff_freeze, |
| 54 | .thaw = ata_sff_thaw, |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 55 | .prereset = ata_sff_prereset, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 56 | .softreset = ata_sff_softreset, |
Tejun Heo | 57c9efd | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 57 | .hardreset = sata_sff_hardreset, |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 58 | .postreset = ata_sff_postreset, |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 59 | .error_handler = ata_sff_error_handler, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 60 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 61 | .sff_dev_select = ata_sff_dev_select, |
| 62 | .sff_check_status = ata_sff_check_status, |
| 63 | .sff_tf_load = ata_sff_tf_load, |
| 64 | .sff_tf_read = ata_sff_tf_read, |
| 65 | .sff_exec_command = ata_sff_exec_command, |
| 66 | .sff_data_xfer = ata_sff_data_xfer, |
Tejun Heo | 8244cd0 | 2010-05-10 21:41:36 +0200 | [diff] [blame] | 67 | .sff_drain_fifo = ata_sff_drain_fifo, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 68 | |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 69 | .lost_interrupt = ata_sff_lost_interrupt, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 70 | }; |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 71 | EXPORT_SYMBOL_GPL(ata_sff_port_ops); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 72 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 73 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 74 | * ata_sff_check_status - Read device status reg & clear interrupt |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 75 | * @ap: port where the device is |
| 76 | * |
| 77 | * Reads ATA taskfile status register for currently-selected device |
| 78 | * and return its value. This also clears pending interrupts |
| 79 | * from this device |
| 80 | * |
| 81 | * LOCKING: |
| 82 | * Inherited from caller. |
| 83 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 84 | u8 ata_sff_check_status(struct ata_port *ap) |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 85 | { |
| 86 | return ioread8(ap->ioaddr.status_addr); |
| 87 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 88 | EXPORT_SYMBOL_GPL(ata_sff_check_status); |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 89 | |
| 90 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 91 | * ata_sff_altstatus - Read device alternate status reg |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 92 | * @ap: port where the device is |
| 93 | * |
| 94 | * Reads ATA taskfile alternate status register for |
| 95 | * currently-selected device and return its value. |
| 96 | * |
| 97 | * Note: may NOT be used as the check_altstatus() entry in |
| 98 | * ata_port_operations. |
| 99 | * |
| 100 | * LOCKING: |
| 101 | * Inherited from caller. |
| 102 | */ |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 103 | static u8 ata_sff_altstatus(struct ata_port *ap) |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 104 | { |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 105 | if (ap->ops->sff_check_altstatus) |
| 106 | return ap->ops->sff_check_altstatus(ap); |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 107 | |
| 108 | return ioread8(ap->ioaddr.altstatus_addr); |
| 109 | } |
| 110 | |
| 111 | /** |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 112 | * ata_sff_irq_status - Check if the device is busy |
| 113 | * @ap: port where the device is |
| 114 | * |
| 115 | * Determine if the port is currently busy. Uses altstatus |
| 116 | * if available in order to avoid clearing shared IRQ status |
| 117 | * when finding an IRQ source. Non ctl capable devices don't |
| 118 | * share interrupt lines fortunately for us. |
| 119 | * |
| 120 | * LOCKING: |
| 121 | * Inherited from caller. |
| 122 | */ |
| 123 | static u8 ata_sff_irq_status(struct ata_port *ap) |
| 124 | { |
| 125 | u8 status; |
| 126 | |
| 127 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { |
| 128 | status = ata_sff_altstatus(ap); |
| 129 | /* Not us: We are busy */ |
| 130 | if (status & ATA_BUSY) |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 131 | return status; |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 132 | } |
| 133 | /* Clear INTRQ latch */ |
Hugh Dickins | 6311c90 | 2008-06-05 14:44:39 +0100 | [diff] [blame] | 134 | status = ap->ops->sff_check_status(ap); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 135 | return status; |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * ata_sff_sync - Flush writes |
| 140 | * @ap: Port to wait for. |
| 141 | * |
| 142 | * CAUTION: |
| 143 | * If we have an mmio device with no ctl and no altstatus |
| 144 | * method this will fail. No such devices are known to exist. |
| 145 | * |
| 146 | * LOCKING: |
| 147 | * Inherited from caller. |
| 148 | */ |
| 149 | |
| 150 | static void ata_sff_sync(struct ata_port *ap) |
| 151 | { |
| 152 | if (ap->ops->sff_check_altstatus) |
| 153 | ap->ops->sff_check_altstatus(ap); |
| 154 | else if (ap->ioaddr.altstatus_addr) |
| 155 | ioread8(ap->ioaddr.altstatus_addr); |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * ata_sff_pause - Flush writes and wait 400nS |
| 160 | * @ap: Port to pause for. |
| 161 | * |
| 162 | * CAUTION: |
| 163 | * If we have an mmio device with no ctl and no altstatus |
| 164 | * method this will fail. No such devices are known to exist. |
| 165 | * |
| 166 | * LOCKING: |
| 167 | * Inherited from caller. |
| 168 | */ |
| 169 | |
| 170 | void ata_sff_pause(struct ata_port *ap) |
| 171 | { |
| 172 | ata_sff_sync(ap); |
| 173 | ndelay(400); |
| 174 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 175 | EXPORT_SYMBOL_GPL(ata_sff_pause); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 176 | |
| 177 | /** |
| 178 | * ata_sff_dma_pause - Pause before commencing DMA |
| 179 | * @ap: Port to pause for. |
| 180 | * |
| 181 | * Perform I/O fencing and ensure sufficient cycle delays occur |
| 182 | * for the HDMA1:0 transition |
| 183 | */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 184 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 185 | void ata_sff_dma_pause(struct ata_port *ap) |
| 186 | { |
| 187 | if (ap->ops->sff_check_altstatus || ap->ioaddr.altstatus_addr) { |
| 188 | /* An altstatus read will cause the needed delay without |
| 189 | messing up the IRQ status */ |
| 190 | ata_sff_altstatus(ap); |
| 191 | return; |
| 192 | } |
| 193 | /* There are no DMA controllers without ctl. BUG here to ensure |
| 194 | we never violate the HDMA1:0 transition timing and risk |
| 195 | corruption. */ |
| 196 | BUG(); |
| 197 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 198 | EXPORT_SYMBOL_GPL(ata_sff_dma_pause); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 199 | |
| 200 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 201 | * ata_sff_busy_sleep - sleep until BSY clears, or timeout |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 202 | * @ap: port containing status register to be polled |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 203 | * @tmout_pat: impatience timeout in msecs |
| 204 | * @tmout: overall timeout in msecs |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 205 | * |
| 206 | * Sleep until ATA Status register bit BSY clears, |
| 207 | * or a timeout occurs. |
| 208 | * |
| 209 | * LOCKING: |
| 210 | * Kernel thread context (may sleep). |
| 211 | * |
| 212 | * RETURNS: |
| 213 | * 0 on success, -errno otherwise. |
| 214 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 215 | int ata_sff_busy_sleep(struct ata_port *ap, |
| 216 | unsigned long tmout_pat, unsigned long tmout) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 217 | { |
| 218 | unsigned long timer_start, timeout; |
| 219 | u8 status; |
| 220 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 221 | status = ata_sff_busy_wait(ap, ATA_BUSY, 300); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 222 | timer_start = jiffies; |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 223 | timeout = ata_deadline(timer_start, tmout_pat); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 224 | while (status != 0xff && (status & ATA_BUSY) && |
| 225 | time_before(jiffies, timeout)) { |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 226 | ata_msleep(ap, 50); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 227 | status = ata_sff_busy_wait(ap, ATA_BUSY, 3); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | if (status != 0xff && (status & ATA_BUSY)) |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 231 | ata_port_warn(ap, |
| 232 | "port is slow to respond, please be patient (Status 0x%x)\n", |
| 233 | status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 234 | |
Tejun Heo | 341c2c9 | 2008-05-20 02:17:51 +0900 | [diff] [blame] | 235 | timeout = ata_deadline(timer_start, tmout); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 236 | while (status != 0xff && (status & ATA_BUSY) && |
| 237 | time_before(jiffies, timeout)) { |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 238 | ata_msleep(ap, 50); |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 239 | status = ap->ops->sff_check_status(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | if (status == 0xff) |
| 243 | return -ENODEV; |
| 244 | |
| 245 | if (status & ATA_BUSY) { |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 246 | ata_port_err(ap, |
| 247 | "port failed to respond (%lu secs, Status 0x%x)\n", |
| 248 | DIV_ROUND_UP(tmout, 1000), status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 249 | return -EBUSY; |
| 250 | } |
| 251 | |
| 252 | return 0; |
| 253 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 254 | EXPORT_SYMBOL_GPL(ata_sff_busy_sleep); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 255 | |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 256 | static int ata_sff_check_ready(struct ata_link *link) |
| 257 | { |
| 258 | u8 status = link->ap->ops->sff_check_status(link->ap); |
| 259 | |
Tejun Heo | 78ab88f | 2008-05-01 23:41:41 +0900 | [diff] [blame] | 260 | return ata_check_ready(status); |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 261 | } |
| 262 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 263 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 264 | * ata_sff_wait_ready - sleep until BSY clears, or timeout |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 265 | * @link: SFF link to wait ready status for |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 266 | * @deadline: deadline jiffies for the operation |
| 267 | * |
| 268 | * Sleep until ATA Status register bit BSY clears, or timeout |
| 269 | * occurs. |
| 270 | * |
| 271 | * LOCKING: |
| 272 | * Kernel thread context (may sleep). |
| 273 | * |
| 274 | * RETURNS: |
| 275 | * 0 on success, -errno otherwise. |
| 276 | */ |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 277 | int ata_sff_wait_ready(struct ata_link *link, unsigned long deadline) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 278 | { |
Tejun Heo | aa2731a | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 279 | return ata_wait_ready(link, deadline, ata_sff_check_ready); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 280 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 281 | EXPORT_SYMBOL_GPL(ata_sff_wait_ready); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 282 | |
| 283 | /** |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 284 | * ata_sff_set_devctl - Write device control reg |
| 285 | * @ap: port where the device is |
| 286 | * @ctl: value to write |
| 287 | * |
| 288 | * Writes ATA taskfile device control register. |
| 289 | * |
| 290 | * Note: may NOT be used as the sff_set_devctl() entry in |
| 291 | * ata_port_operations. |
| 292 | * |
| 293 | * LOCKING: |
| 294 | * Inherited from caller. |
| 295 | */ |
| 296 | static void ata_sff_set_devctl(struct ata_port *ap, u8 ctl) |
| 297 | { |
| 298 | if (ap->ops->sff_set_devctl) |
| 299 | ap->ops->sff_set_devctl(ap, ctl); |
| 300 | else |
| 301 | iowrite8(ctl, ap->ioaddr.ctl_addr); |
| 302 | } |
| 303 | |
| 304 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 305 | * ata_sff_dev_select - Select device 0/1 on ATA bus |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 306 | * @ap: ATA channel to manipulate |
| 307 | * @device: ATA device (numbered from zero) to select |
| 308 | * |
| 309 | * Use the method defined in the ATA specification to |
| 310 | * make either device 0, or device 1, active on the |
| 311 | * ATA channel. Works with both PIO and MMIO. |
| 312 | * |
| 313 | * May be used as the dev_select() entry in ata_port_operations. |
| 314 | * |
| 315 | * LOCKING: |
| 316 | * caller. |
| 317 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 318 | void ata_sff_dev_select(struct ata_port *ap, unsigned int device) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 319 | { |
| 320 | u8 tmp; |
| 321 | |
| 322 | if (device == 0) |
| 323 | tmp = ATA_DEVICE_OBS; |
| 324 | else |
| 325 | tmp = ATA_DEVICE_OBS | ATA_DEV1; |
| 326 | |
| 327 | iowrite8(tmp, ap->ioaddr.device_addr); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 328 | ata_sff_pause(ap); /* needed; also flushes, for mmio */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 329 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 330 | EXPORT_SYMBOL_GPL(ata_sff_dev_select); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 331 | |
| 332 | /** |
| 333 | * ata_dev_select - Select device 0/1 on ATA bus |
| 334 | * @ap: ATA channel to manipulate |
| 335 | * @device: ATA device (numbered from zero) to select |
| 336 | * @wait: non-zero to wait for Status register BSY bit to clear |
| 337 | * @can_sleep: non-zero if context allows sleeping |
| 338 | * |
| 339 | * Use the method defined in the ATA specification to |
| 340 | * make either device 0, or device 1, active on the |
| 341 | * ATA channel. |
| 342 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 343 | * This is a high-level version of ata_sff_dev_select(), which |
| 344 | * additionally provides the services of inserting the proper |
| 345 | * pauses and status polling, where needed. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 346 | * |
| 347 | * LOCKING: |
| 348 | * caller. |
| 349 | */ |
Tejun Heo | c7a8209 | 2010-05-10 21:41:29 +0200 | [diff] [blame] | 350 | static void ata_dev_select(struct ata_port *ap, unsigned int device, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 351 | unsigned int wait, unsigned int can_sleep) |
| 352 | { |
| 353 | if (ata_msg_probe(ap)) |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 354 | ata_port_info(ap, "ata_dev_select: ENTER, device %u, wait %u\n", |
| 355 | device, wait); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 356 | |
| 357 | if (wait) |
| 358 | ata_wait_idle(ap); |
| 359 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 360 | ap->ops->sff_dev_select(ap, device); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 361 | |
| 362 | if (wait) { |
| 363 | if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI) |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 364 | ata_msleep(ap, 150); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 365 | ata_wait_idle(ap); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 370 | * ata_sff_irq_on - Enable interrupts on a port. |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 371 | * @ap: Port on which interrupts are enabled. |
| 372 | * |
| 373 | * Enable interrupts on a legacy IDE device using MMIO or PIO, |
| 374 | * wait for idle, clear any pending interrupts. |
| 375 | * |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 376 | * Note: may NOT be used as the sff_irq_on() entry in |
| 377 | * ata_port_operations. |
| 378 | * |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 379 | * LOCKING: |
| 380 | * Inherited from caller. |
| 381 | */ |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 382 | void ata_sff_irq_on(struct ata_port *ap) |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 383 | { |
| 384 | struct ata_ioports *ioaddr = &ap->ioaddr; |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 385 | |
| 386 | if (ap->ops->sff_irq_on) { |
| 387 | ap->ops->sff_irq_on(ap); |
| 388 | return; |
| 389 | } |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 390 | |
| 391 | ap->ctl &= ~ATA_NIEN; |
| 392 | ap->last_ctl = ap->ctl; |
| 393 | |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 394 | if (ap->ops->sff_set_devctl || ioaddr->ctl_addr) |
| 395 | ata_sff_set_devctl(ap, ap->ctl); |
| 396 | ata_wait_idle(ap); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 397 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 398 | if (ap->ops->sff_irq_clear) |
| 399 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 400 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 401 | EXPORT_SYMBOL_GPL(ata_sff_irq_on); |
Tejun Heo | 90088bb | 2006-10-09 11:10:26 +0900 | [diff] [blame] | 402 | |
| 403 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 404 | * ata_sff_tf_load - send taskfile registers to host controller |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 405 | * @ap: Port to which output is sent |
| 406 | * @tf: ATA taskfile register set |
| 407 | * |
| 408 | * Outputs ATA taskfile to standard ATA host controller. |
| 409 | * |
| 410 | * LOCKING: |
| 411 | * Inherited from caller. |
| 412 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 413 | void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 414 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 415 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 416 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; |
| 417 | |
| 418 | if (tf->ctl != ap->last_ctl) { |
Tejun Heo | f659f0e4 | 2008-03-06 13:12:54 +0900 | [diff] [blame] | 419 | if (ioaddr->ctl_addr) |
| 420 | iowrite8(tf->ctl, ioaddr->ctl_addr); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 421 | ap->last_ctl = tf->ctl; |
Tejun Heo | 40c6023 | 2010-09-09 17:13:31 +0200 | [diff] [blame] | 422 | ata_wait_idle(ap); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 423 | } |
| 424 | |
| 425 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 426 | WARN_ON_ONCE(!ioaddr->ctl_addr); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 427 | iowrite8(tf->hob_feature, ioaddr->feature_addr); |
| 428 | iowrite8(tf->hob_nsect, ioaddr->nsect_addr); |
| 429 | iowrite8(tf->hob_lbal, ioaddr->lbal_addr); |
| 430 | iowrite8(tf->hob_lbam, ioaddr->lbam_addr); |
| 431 | iowrite8(tf->hob_lbah, ioaddr->lbah_addr); |
| 432 | VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n", |
| 433 | tf->hob_feature, |
| 434 | tf->hob_nsect, |
| 435 | tf->hob_lbal, |
| 436 | tf->hob_lbam, |
| 437 | tf->hob_lbah); |
| 438 | } |
| 439 | |
| 440 | if (is_addr) { |
| 441 | iowrite8(tf->feature, ioaddr->feature_addr); |
| 442 | iowrite8(tf->nsect, ioaddr->nsect_addr); |
| 443 | iowrite8(tf->lbal, ioaddr->lbal_addr); |
| 444 | iowrite8(tf->lbam, ioaddr->lbam_addr); |
| 445 | iowrite8(tf->lbah, ioaddr->lbah_addr); |
| 446 | VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n", |
| 447 | tf->feature, |
| 448 | tf->nsect, |
| 449 | tf->lbal, |
| 450 | tf->lbam, |
| 451 | tf->lbah); |
| 452 | } |
| 453 | |
| 454 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 455 | iowrite8(tf->device, ioaddr->device_addr); |
| 456 | VPRINTK("device 0x%X\n", tf->device); |
| 457 | } |
Tejun Heo | 40c6023 | 2010-09-09 17:13:31 +0200 | [diff] [blame] | 458 | |
| 459 | ata_wait_idle(ap); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 460 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 461 | EXPORT_SYMBOL_GPL(ata_sff_tf_load); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 462 | |
| 463 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 464 | * ata_sff_tf_read - input device's ATA taskfile shadow registers |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 465 | * @ap: Port from which input is read |
| 466 | * @tf: ATA taskfile register set for storing input |
| 467 | * |
| 468 | * Reads ATA taskfile registers for currently-selected device |
Alan Cox | 76548ed | 2007-11-19 14:34:56 +0000 | [diff] [blame] | 469 | * into @tf. Assumes the device has a fully SFF compliant task file |
| 470 | * layout and behaviour. If you device does not (eg has a different |
| 471 | * status method) then you will need to provide a replacement tf_read |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 472 | * |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 473 | * LOCKING: |
| 474 | * Inherited from caller. |
| 475 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 476 | void ata_sff_tf_read(struct ata_port *ap, struct ata_taskfile *tf) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 477 | { |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 478 | struct ata_ioports *ioaddr = &ap->ioaddr; |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 479 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 480 | tf->command = ata_sff_check_status(ap); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 481 | tf->feature = ioread8(ioaddr->error_addr); |
| 482 | tf->nsect = ioread8(ioaddr->nsect_addr); |
| 483 | tf->lbal = ioread8(ioaddr->lbal_addr); |
| 484 | tf->lbam = ioread8(ioaddr->lbam_addr); |
| 485 | tf->lbah = ioread8(ioaddr->lbah_addr); |
| 486 | tf->device = ioread8(ioaddr->device_addr); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 487 | |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 488 | if (tf->flags & ATA_TFLAG_LBA48) { |
Tejun Heo | f659f0e4 | 2008-03-06 13:12:54 +0900 | [diff] [blame] | 489 | if (likely(ioaddr->ctl_addr)) { |
| 490 | iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr); |
| 491 | tf->hob_feature = ioread8(ioaddr->error_addr); |
| 492 | tf->hob_nsect = ioread8(ioaddr->nsect_addr); |
| 493 | tf->hob_lbal = ioread8(ioaddr->lbal_addr); |
| 494 | tf->hob_lbam = ioread8(ioaddr->lbam_addr); |
| 495 | tf->hob_lbah = ioread8(ioaddr->lbah_addr); |
| 496 | iowrite8(tf->ctl, ioaddr->ctl_addr); |
| 497 | ap->last_ctl = tf->ctl; |
| 498 | } else |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 499 | WARN_ON_ONCE(1); |
Tejun Heo | 0d5ff56 | 2007-02-01 15:06:36 +0900 | [diff] [blame] | 500 | } |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 501 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 502 | EXPORT_SYMBOL_GPL(ata_sff_tf_read); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 503 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 504 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 505 | * ata_sff_exec_command - issue ATA command to host controller |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 506 | * @ap: port to which command is being issued |
| 507 | * @tf: ATA taskfile register set |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 508 | * |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 509 | * Issues ATA command, with proper synchronization with interrupt |
| 510 | * handler / other threads. |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 511 | * |
| 512 | * LOCKING: |
Jeff Garzik | cca3974 | 2006-08-24 03:19:22 -0400 | [diff] [blame] | 513 | * spin_lock_irqsave(host lock) |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 514 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 515 | void ata_sff_exec_command(struct ata_port *ap, const struct ata_taskfile *tf) |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 516 | { |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 517 | DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 518 | |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 519 | iowrite8(tf->command, ap->ioaddr.command_addr); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 520 | ata_sff_pause(ap); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 521 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 522 | EXPORT_SYMBOL_GPL(ata_sff_exec_command); |
Jeff Garzik | 2cc432e | 2006-03-23 00:32:03 -0500 | [diff] [blame] | 523 | |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 524 | /** |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 525 | * ata_tf_to_host - issue ATA taskfile to host controller |
| 526 | * @ap: port to which command is being issued |
| 527 | * @tf: ATA taskfile register set |
| 528 | * |
| 529 | * Issues ATA taskfile register set to ATA host controller, |
| 530 | * with proper synchronization with interrupt handler and |
| 531 | * other threads. |
| 532 | * |
| 533 | * LOCKING: |
| 534 | * spin_lock_irqsave(host lock) |
| 535 | */ |
| 536 | static inline void ata_tf_to_host(struct ata_port *ap, |
| 537 | const struct ata_taskfile *tf) |
| 538 | { |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 539 | ap->ops->sff_tf_load(ap, tf); |
| 540 | ap->ops->sff_exec_command(ap, tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 544 | * ata_sff_data_xfer - Transfer data by PIO |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 545 | * @dev: device to target |
| 546 | * @buf: data buffer |
| 547 | * @buflen: buffer length |
| 548 | * @rw: read/write |
| 549 | * |
| 550 | * Transfer data from/to the device data register by PIO. |
| 551 | * |
| 552 | * LOCKING: |
| 553 | * Inherited from caller. |
| 554 | * |
| 555 | * RETURNS: |
| 556 | * Bytes consumed. |
| 557 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 558 | unsigned int ata_sff_data_xfer(struct ata_device *dev, unsigned char *buf, |
| 559 | unsigned int buflen, int rw) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 560 | { |
| 561 | struct ata_port *ap = dev->link->ap; |
| 562 | void __iomem *data_addr = ap->ioaddr.data_addr; |
| 563 | unsigned int words = buflen >> 1; |
| 564 | |
| 565 | /* Transfer multiple of 2 bytes */ |
| 566 | if (rw == READ) |
| 567 | ioread16_rep(data_addr, buf, words); |
| 568 | else |
| 569 | iowrite16_rep(data_addr, buf, words); |
| 570 | |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 571 | /* Transfer trailing byte, if any. */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 572 | if (unlikely(buflen & 0x01)) { |
Tejun Heo | 21dba24 | 2011-09-06 13:09:05 +0900 | [diff] [blame] | 573 | unsigned char pad[2] = { }; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 574 | |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 575 | /* Point buf to the tail of buffer */ |
| 576 | buf += buflen - 1; |
| 577 | |
| 578 | /* |
| 579 | * Use io*16_rep() accessors here as well to avoid pointlessly |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 580 | * swapping bytes to and from on the big endian machines... |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 581 | */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 582 | if (rw == READ) { |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 583 | ioread16_rep(data_addr, pad, 1); |
| 584 | *buf = pad[0]; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 585 | } else { |
Sergei Shtylyov | 2102d74 | 2009-02-15 23:30:38 +0400 | [diff] [blame] | 586 | pad[0] = *buf; |
| 587 | iowrite16_rep(data_addr, pad, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 588 | } |
| 589 | words++; |
| 590 | } |
| 591 | |
| 592 | return words << 1; |
| 593 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 594 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 595 | |
| 596 | /** |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 597 | * ata_sff_data_xfer32 - Transfer data by PIO |
| 598 | * @dev: device to target |
| 599 | * @buf: data buffer |
| 600 | * @buflen: buffer length |
| 601 | * @rw: read/write |
| 602 | * |
| 603 | * Transfer data from/to the device data register by PIO using 32bit |
| 604 | * I/O operations. |
| 605 | * |
| 606 | * LOCKING: |
| 607 | * Inherited from caller. |
| 608 | * |
| 609 | * RETURNS: |
| 610 | * Bytes consumed. |
| 611 | */ |
| 612 | |
| 613 | unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf, |
| 614 | unsigned int buflen, int rw) |
| 615 | { |
| 616 | struct ata_port *ap = dev->link->ap; |
| 617 | void __iomem *data_addr = ap->ioaddr.data_addr; |
| 618 | unsigned int words = buflen >> 2; |
| 619 | int slop = buflen & 3; |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 620 | |
Alan Cox | e3cf95d | 2009-04-09 17:31:17 +0100 | [diff] [blame] | 621 | if (!(ap->pflags & ATA_PFLAG_PIO32)) |
| 622 | return ata_sff_data_xfer(dev, buf, buflen, rw); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 623 | |
| 624 | /* Transfer multiple of 4 bytes */ |
| 625 | if (rw == READ) |
| 626 | ioread32_rep(data_addr, buf, words); |
| 627 | else |
| 628 | iowrite32_rep(data_addr, buf, words); |
| 629 | |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 630 | /* Transfer trailing bytes, if any */ |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 631 | if (unlikely(slop)) { |
Tejun Heo | 21dba24 | 2011-09-06 13:09:05 +0900 | [diff] [blame] | 632 | unsigned char pad[4] = { }; |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 633 | |
| 634 | /* Point buf to the tail of buffer */ |
| 635 | buf += buflen - slop; |
| 636 | |
| 637 | /* |
| 638 | * Use io*_rep() accessors here as well to avoid pointlessly |
Krzysztof Halasa | 972b94f | 2009-11-11 00:55:27 +0100 | [diff] [blame] | 639 | * swapping bytes to and from on the big endian machines... |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 640 | */ |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 641 | if (rw == READ) { |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 642 | if (slop < 3) |
| 643 | ioread16_rep(data_addr, pad, 1); |
| 644 | else |
| 645 | ioread32_rep(data_addr, pad, 1); |
| 646 | memcpy(buf, pad, slop); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 647 | } else { |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 648 | memcpy(pad, buf, slop); |
| 649 | if (slop < 3) |
| 650 | iowrite16_rep(data_addr, pad, 1); |
| 651 | else |
| 652 | iowrite32_rep(data_addr, pad, 1); |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 653 | } |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 654 | } |
Sergei Shtylyov | d1b3525 | 2009-02-15 23:24:24 +0400 | [diff] [blame] | 655 | return (buflen + 1) & ~1; |
Alan Cox | 871af12 | 2009-01-05 14:16:39 +0000 | [diff] [blame] | 656 | } |
| 657 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer32); |
| 658 | |
| 659 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 660 | * ata_sff_data_xfer_noirq - Transfer data by PIO |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 661 | * @dev: device to target |
| 662 | * @buf: data buffer |
| 663 | * @buflen: buffer length |
| 664 | * @rw: read/write |
| 665 | * |
| 666 | * Transfer data from/to the device data register by PIO. Do the |
| 667 | * transfer with interrupts disabled. |
| 668 | * |
| 669 | * LOCKING: |
| 670 | * Inherited from caller. |
| 671 | * |
| 672 | * RETURNS: |
| 673 | * Bytes consumed. |
| 674 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 675 | unsigned int ata_sff_data_xfer_noirq(struct ata_device *dev, unsigned char *buf, |
| 676 | unsigned int buflen, int rw) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 677 | { |
| 678 | unsigned long flags; |
| 679 | unsigned int consumed; |
| 680 | |
| 681 | local_irq_save(flags); |
Bartlomiej Zolnierkiewicz | 418fae2 | 2011-10-13 15:04:43 +0200 | [diff] [blame] | 682 | consumed = ata_sff_data_xfer32(dev, buf, buflen, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 683 | local_irq_restore(flags); |
| 684 | |
| 685 | return consumed; |
| 686 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 687 | EXPORT_SYMBOL_GPL(ata_sff_data_xfer_noirq); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 688 | |
| 689 | /** |
| 690 | * ata_pio_sector - Transfer a sector of data. |
| 691 | * @qc: Command on going |
| 692 | * |
| 693 | * Transfer qc->sect_size bytes of data from/to the ATA device. |
| 694 | * |
| 695 | * LOCKING: |
| 696 | * Inherited from caller. |
| 697 | */ |
| 698 | static void ata_pio_sector(struct ata_queued_cmd *qc) |
| 699 | { |
| 700 | int do_write = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 701 | struct ata_port *ap = qc->ap; |
| 702 | struct page *page; |
| 703 | unsigned int offset; |
| 704 | unsigned char *buf; |
| 705 | |
| 706 | if (qc->curbytes == qc->nbytes - qc->sect_size) |
| 707 | ap->hsm_task_state = HSM_ST_LAST; |
| 708 | |
| 709 | page = sg_page(qc->cursg); |
| 710 | offset = qc->cursg->offset + qc->cursg_ofs; |
| 711 | |
| 712 | /* get the current page and offset */ |
| 713 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 714 | offset %= PAGE_SIZE; |
| 715 | |
| 716 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 717 | |
| 718 | if (PageHighMem(page)) { |
| 719 | unsigned long flags; |
| 720 | |
| 721 | /* FIXME: use a bounce buffer */ |
| 722 | local_irq_save(flags); |
| 723 | buf = kmap_atomic(page, KM_IRQ0); |
| 724 | |
| 725 | /* do the actual data transfer */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 726 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
| 727 | do_write); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 728 | |
| 729 | kunmap_atomic(buf, KM_IRQ0); |
| 730 | local_irq_restore(flags); |
| 731 | } else { |
| 732 | buf = page_address(page); |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 733 | ap->ops->sff_data_xfer(qc->dev, buf + offset, qc->sect_size, |
| 734 | do_write); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 735 | } |
| 736 | |
Sebastian Andrzej Siewior | 3842e83 | 2010-03-21 22:52:23 +0100 | [diff] [blame] | 737 | if (!do_write && !PageSlab(page)) |
Catalin Marinas | 2d68b7f | 2010-02-04 01:04:50 -0500 | [diff] [blame] | 738 | flush_dcache_page(page); |
| 739 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 740 | qc->curbytes += qc->sect_size; |
| 741 | qc->cursg_ofs += qc->sect_size; |
| 742 | |
| 743 | if (qc->cursg_ofs == qc->cursg->length) { |
| 744 | qc->cursg = sg_next(qc->cursg); |
| 745 | qc->cursg_ofs = 0; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /** |
| 750 | * ata_pio_sectors - Transfer one or many sectors. |
| 751 | * @qc: Command on going |
| 752 | * |
| 753 | * Transfer one or many sectors of data from/to the |
| 754 | * ATA device for the DRQ request. |
| 755 | * |
| 756 | * LOCKING: |
| 757 | * Inherited from caller. |
| 758 | */ |
| 759 | static void ata_pio_sectors(struct ata_queued_cmd *qc) |
| 760 | { |
| 761 | if (is_multi_taskfile(&qc->tf)) { |
| 762 | /* READ/WRITE MULTIPLE */ |
| 763 | unsigned int nsect; |
| 764 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 765 | WARN_ON_ONCE(qc->dev->multi_count == 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 766 | |
| 767 | nsect = min((qc->nbytes - qc->curbytes) / qc->sect_size, |
| 768 | qc->dev->multi_count); |
| 769 | while (nsect--) |
| 770 | ata_pio_sector(qc); |
| 771 | } else |
| 772 | ata_pio_sector(qc); |
| 773 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 774 | ata_sff_sync(qc->ap); /* flush */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 775 | } |
| 776 | |
| 777 | /** |
| 778 | * atapi_send_cdb - Write CDB bytes to hardware |
| 779 | * @ap: Port to which ATAPI device is attached. |
| 780 | * @qc: Taskfile currently active |
| 781 | * |
| 782 | * When device has indicated its readiness to accept |
| 783 | * a CDB, this function is called. Send the CDB. |
| 784 | * |
| 785 | * LOCKING: |
| 786 | * caller. |
| 787 | */ |
| 788 | static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 789 | { |
| 790 | /* send SCSI cdb */ |
| 791 | DPRINTK("send cdb\n"); |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 792 | WARN_ON_ONCE(qc->dev->cdb_len < 12); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 793 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 794 | ap->ops->sff_data_xfer(qc->dev, qc->cdb, qc->dev->cdb_len, 1); |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 795 | ata_sff_sync(ap); |
| 796 | /* FIXME: If the CDB is for DMA do we need to do the transition delay |
| 797 | or is bmdma_start guaranteed to do it ? */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 798 | switch (qc->tf.protocol) { |
| 799 | case ATAPI_PROT_PIO: |
| 800 | ap->hsm_task_state = HSM_ST; |
| 801 | break; |
| 802 | case ATAPI_PROT_NODATA: |
| 803 | ap->hsm_task_state = HSM_ST_LAST; |
| 804 | break; |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 805 | #ifdef CONFIG_ATA_BMDMA |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 806 | case ATAPI_PROT_DMA: |
| 807 | ap->hsm_task_state = HSM_ST_LAST; |
| 808 | /* initiate bmdma */ |
| 809 | ap->ops->bmdma_start(qc); |
| 810 | break; |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 811 | #endif /* CONFIG_ATA_BMDMA */ |
| 812 | default: |
| 813 | BUG(); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 814 | } |
| 815 | } |
| 816 | |
| 817 | /** |
| 818 | * __atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 819 | * @qc: Command on going |
| 820 | * @bytes: number of bytes |
| 821 | * |
| 822 | * Transfer Transfer data from/to the ATAPI device. |
| 823 | * |
| 824 | * LOCKING: |
| 825 | * Inherited from caller. |
| 826 | * |
| 827 | */ |
| 828 | static int __atapi_pio_bytes(struct ata_queued_cmd *qc, unsigned int bytes) |
| 829 | { |
| 830 | int rw = (qc->tf.flags & ATA_TFLAG_WRITE) ? WRITE : READ; |
| 831 | struct ata_port *ap = qc->ap; |
| 832 | struct ata_device *dev = qc->dev; |
| 833 | struct ata_eh_info *ehi = &dev->link->eh_info; |
| 834 | struct scatterlist *sg; |
| 835 | struct page *page; |
| 836 | unsigned char *buf; |
| 837 | unsigned int offset, count, consumed; |
| 838 | |
| 839 | next_sg: |
| 840 | sg = qc->cursg; |
| 841 | if (unlikely(!sg)) { |
| 842 | ata_ehi_push_desc(ehi, "unexpected or too much trailing data " |
| 843 | "buf=%u cur=%u bytes=%u", |
| 844 | qc->nbytes, qc->curbytes, bytes); |
| 845 | return -1; |
| 846 | } |
| 847 | |
| 848 | page = sg_page(sg); |
| 849 | offset = sg->offset + qc->cursg_ofs; |
| 850 | |
| 851 | /* get the current page and offset */ |
| 852 | page = nth_page(page, (offset >> PAGE_SHIFT)); |
| 853 | offset %= PAGE_SIZE; |
| 854 | |
| 855 | /* don't overrun current sg */ |
| 856 | count = min(sg->length - qc->cursg_ofs, bytes); |
| 857 | |
| 858 | /* don't cross page boundaries */ |
| 859 | count = min(count, (unsigned int)PAGE_SIZE - offset); |
| 860 | |
| 861 | DPRINTK("data %s\n", qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read"); |
| 862 | |
| 863 | if (PageHighMem(page)) { |
| 864 | unsigned long flags; |
| 865 | |
| 866 | /* FIXME: use bounce buffer */ |
| 867 | local_irq_save(flags); |
| 868 | buf = kmap_atomic(page, KM_IRQ0); |
| 869 | |
| 870 | /* do the actual data transfer */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 871 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
| 872 | count, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 873 | |
| 874 | kunmap_atomic(buf, KM_IRQ0); |
| 875 | local_irq_restore(flags); |
| 876 | } else { |
| 877 | buf = page_address(page); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 878 | consumed = ap->ops->sff_data_xfer(dev, buf + offset, |
| 879 | count, rw); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 880 | } |
| 881 | |
| 882 | bytes -= min(bytes, consumed); |
| 883 | qc->curbytes += count; |
| 884 | qc->cursg_ofs += count; |
| 885 | |
| 886 | if (qc->cursg_ofs == sg->length) { |
| 887 | qc->cursg = sg_next(qc->cursg); |
| 888 | qc->cursg_ofs = 0; |
| 889 | } |
| 890 | |
Christian Borntraeger | a0f79f7 | 2009-01-13 10:38:36 +0100 | [diff] [blame] | 891 | /* |
| 892 | * There used to be a WARN_ON_ONCE(qc->cursg && count != consumed); |
| 893 | * Unfortunately __atapi_pio_bytes doesn't know enough to do the WARN |
| 894 | * check correctly as it doesn't know if it is the last request being |
| 895 | * made. Somebody should implement a proper sanity check. |
| 896 | */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 897 | if (bytes) |
| 898 | goto next_sg; |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | /** |
| 903 | * atapi_pio_bytes - Transfer data from/to the ATAPI device. |
| 904 | * @qc: Command on going |
| 905 | * |
| 906 | * Transfer Transfer data from/to the ATAPI device. |
| 907 | * |
| 908 | * LOCKING: |
| 909 | * Inherited from caller. |
| 910 | */ |
| 911 | static void atapi_pio_bytes(struct ata_queued_cmd *qc) |
| 912 | { |
| 913 | struct ata_port *ap = qc->ap; |
| 914 | struct ata_device *dev = qc->dev; |
| 915 | struct ata_eh_info *ehi = &dev->link->eh_info; |
| 916 | unsigned int ireason, bc_lo, bc_hi, bytes; |
| 917 | int i_write, do_write = (qc->tf.flags & ATA_TFLAG_WRITE) ? 1 : 0; |
| 918 | |
| 919 | /* Abuse qc->result_tf for temp storage of intermediate TF |
| 920 | * here to save some kernel stack usage. |
| 921 | * For normal completion, qc->result_tf is not relevant. For |
| 922 | * error, qc->result_tf is later overwritten by ata_qc_complete(). |
| 923 | * So, the correctness of qc->result_tf is not affected. |
| 924 | */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 925 | ap->ops->sff_tf_read(ap, &qc->result_tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 926 | ireason = qc->result_tf.nsect; |
| 927 | bc_lo = qc->result_tf.lbam; |
| 928 | bc_hi = qc->result_tf.lbah; |
| 929 | bytes = (bc_hi << 8) | bc_lo; |
| 930 | |
| 931 | /* shall be cleared to zero, indicating xfer of data */ |
| 932 | if (unlikely(ireason & (1 << 0))) |
| 933 | goto atapi_check; |
| 934 | |
| 935 | /* make sure transfer direction matches expected */ |
| 936 | i_write = ((ireason & (1 << 1)) == 0) ? 1 : 0; |
| 937 | if (unlikely(do_write != i_write)) |
| 938 | goto atapi_check; |
| 939 | |
| 940 | if (unlikely(!bytes)) |
| 941 | goto atapi_check; |
| 942 | |
| 943 | VPRINTK("ata%u: xfering %d bytes\n", ap->print_id, bytes); |
| 944 | |
| 945 | if (unlikely(__atapi_pio_bytes(qc, bytes))) |
| 946 | goto err_out; |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 947 | ata_sff_sync(ap); /* flush */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 948 | |
| 949 | return; |
| 950 | |
| 951 | atapi_check: |
| 952 | ata_ehi_push_desc(ehi, "ATAPI check failed (ireason=0x%x bytes=%u)", |
| 953 | ireason, bytes); |
| 954 | err_out: |
| 955 | qc->err_mask |= AC_ERR_HSM; |
| 956 | ap->hsm_task_state = HSM_ST_ERR; |
| 957 | } |
| 958 | |
| 959 | /** |
| 960 | * ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue. |
| 961 | * @ap: the target ata_port |
| 962 | * @qc: qc on going |
| 963 | * |
| 964 | * RETURNS: |
| 965 | * 1 if ok in workqueue, 0 otherwise. |
| 966 | */ |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 967 | static inline int ata_hsm_ok_in_wq(struct ata_port *ap, |
| 968 | struct ata_queued_cmd *qc) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 969 | { |
| 970 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 971 | return 1; |
| 972 | |
| 973 | if (ap->hsm_task_state == HSM_ST_FIRST) { |
| 974 | if (qc->tf.protocol == ATA_PROT_PIO && |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 975 | (qc->tf.flags & ATA_TFLAG_WRITE)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 976 | return 1; |
| 977 | |
| 978 | if (ata_is_atapi(qc->tf.protocol) && |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 979 | !(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 980 | return 1; |
| 981 | } |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | /** |
| 987 | * ata_hsm_qc_complete - finish a qc running on standard HSM |
| 988 | * @qc: Command to complete |
| 989 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 990 | * |
| 991 | * Finish @qc which is running on standard HSM. |
| 992 | * |
| 993 | * LOCKING: |
| 994 | * If @in_wq is zero, spin_lock_irqsave(host lock). |
| 995 | * Otherwise, none on entry and grabs host lock. |
| 996 | */ |
| 997 | static void ata_hsm_qc_complete(struct ata_queued_cmd *qc, int in_wq) |
| 998 | { |
| 999 | struct ata_port *ap = qc->ap; |
| 1000 | unsigned long flags; |
| 1001 | |
| 1002 | if (ap->ops->error_handler) { |
| 1003 | if (in_wq) { |
| 1004 | spin_lock_irqsave(ap->lock, flags); |
| 1005 | |
| 1006 | /* EH might have kicked in while host lock is |
| 1007 | * released. |
| 1008 | */ |
| 1009 | qc = ata_qc_from_tag(ap, qc->tag); |
| 1010 | if (qc) { |
| 1011 | if (likely(!(qc->err_mask & AC_ERR_HSM))) { |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1012 | ata_sff_irq_on(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1013 | ata_qc_complete(qc); |
| 1014 | } else |
| 1015 | ata_port_freeze(ap); |
| 1016 | } |
| 1017 | |
| 1018 | spin_unlock_irqrestore(ap->lock, flags); |
| 1019 | } else { |
| 1020 | if (likely(!(qc->err_mask & AC_ERR_HSM))) |
| 1021 | ata_qc_complete(qc); |
| 1022 | else |
| 1023 | ata_port_freeze(ap); |
| 1024 | } |
| 1025 | } else { |
| 1026 | if (in_wq) { |
| 1027 | spin_lock_irqsave(ap->lock, flags); |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1028 | ata_sff_irq_on(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1029 | ata_qc_complete(qc); |
| 1030 | spin_unlock_irqrestore(ap->lock, flags); |
| 1031 | } else |
| 1032 | ata_qc_complete(qc); |
| 1033 | } |
| 1034 | } |
| 1035 | |
| 1036 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1037 | * ata_sff_hsm_move - move the HSM to the next state. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1038 | * @ap: the target ata_port |
| 1039 | * @qc: qc on going |
| 1040 | * @status: current device status |
| 1041 | * @in_wq: 1 if called from workqueue, 0 otherwise |
| 1042 | * |
| 1043 | * RETURNS: |
| 1044 | * 1 when poll next status needed, 0 otherwise. |
| 1045 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1046 | int ata_sff_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc, |
| 1047 | u8 status, int in_wq) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1048 | { |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1049 | struct ata_link *link = qc->dev->link; |
| 1050 | struct ata_eh_info *ehi = &link->eh_info; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1051 | unsigned long flags = 0; |
| 1052 | int poll_next; |
| 1053 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1054 | WARN_ON_ONCE((qc->flags & ATA_QCFLAG_ACTIVE) == 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1055 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1056 | /* Make sure ata_sff_qc_issue() does not throw things |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1057 | * like DMA polling into the workqueue. Notice that |
| 1058 | * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING). |
| 1059 | */ |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1060 | WARN_ON_ONCE(in_wq != ata_hsm_ok_in_wq(ap, qc)); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1061 | |
| 1062 | fsm_start: |
| 1063 | DPRINTK("ata%u: protocol %d task_state %d (dev_stat 0x%X)\n", |
| 1064 | ap->print_id, qc->tf.protocol, ap->hsm_task_state, status); |
| 1065 | |
| 1066 | switch (ap->hsm_task_state) { |
| 1067 | case HSM_ST_FIRST: |
| 1068 | /* Send first data block or PACKET CDB */ |
| 1069 | |
| 1070 | /* If polling, we will stay in the work queue after |
| 1071 | * sending the data. Otherwise, interrupt handler |
| 1072 | * takes over after sending the data. |
| 1073 | */ |
| 1074 | poll_next = (qc->tf.flags & ATA_TFLAG_POLLING); |
| 1075 | |
| 1076 | /* check device status */ |
| 1077 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 1078 | /* handle BSY=0, DRQ=0 as error */ |
| 1079 | if (likely(status & (ATA_ERR | ATA_DF))) |
| 1080 | /* device stops HSM for abort/error */ |
| 1081 | qc->err_mask |= AC_ERR_DEV; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1082 | else { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1083 | /* HSM violation. Let EH handle this */ |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1084 | ata_ehi_push_desc(ehi, |
| 1085 | "ST_FIRST: !(DRQ|ERR|DF)"); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1086 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1087 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1088 | |
| 1089 | ap->hsm_task_state = HSM_ST_ERR; |
| 1090 | goto fsm_start; |
| 1091 | } |
| 1092 | |
| 1093 | /* Device should not ask for data transfer (DRQ=1) |
| 1094 | * when it finds something wrong. |
| 1095 | * We ignore DRQ here and stop the HSM by |
| 1096 | * changing hsm_task_state to HSM_ST_ERR and |
| 1097 | * let the EH abort the command or reset the device. |
| 1098 | */ |
| 1099 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
| 1100 | /* Some ATAPI tape drives forget to clear the ERR bit |
| 1101 | * when doing the next command (mostly request sense). |
| 1102 | * We ignore ERR here to workaround and proceed sending |
| 1103 | * the CDB. |
| 1104 | */ |
| 1105 | if (!(qc->dev->horkage & ATA_HORKAGE_STUCK_ERR)) { |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1106 | ata_ehi_push_desc(ehi, "ST_FIRST: " |
| 1107 | "DRQ=1 with device error, " |
| 1108 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1109 | qc->err_mask |= AC_ERR_HSM; |
| 1110 | ap->hsm_task_state = HSM_ST_ERR; |
| 1111 | goto fsm_start; |
| 1112 | } |
| 1113 | } |
| 1114 | |
| 1115 | /* Send the CDB (atapi) or the first data block (ata pio out). |
| 1116 | * During the state transition, interrupt handler shouldn't |
| 1117 | * be invoked before the data transfer is complete and |
| 1118 | * hsm_task_state is changed. Hence, the following locking. |
| 1119 | */ |
| 1120 | if (in_wq) |
| 1121 | spin_lock_irqsave(ap->lock, flags); |
| 1122 | |
| 1123 | if (qc->tf.protocol == ATA_PROT_PIO) { |
| 1124 | /* PIO data out protocol. |
| 1125 | * send first data block. |
| 1126 | */ |
| 1127 | |
| 1128 | /* ata_pio_sectors() might change the state |
| 1129 | * to HSM_ST_LAST. so, the state is changed here |
| 1130 | * before ata_pio_sectors(). |
| 1131 | */ |
| 1132 | ap->hsm_task_state = HSM_ST; |
| 1133 | ata_pio_sectors(qc); |
| 1134 | } else |
| 1135 | /* send CDB */ |
| 1136 | atapi_send_cdb(ap, qc); |
| 1137 | |
| 1138 | if (in_wq) |
| 1139 | spin_unlock_irqrestore(ap->lock, flags); |
| 1140 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1141 | /* if polling, ata_sff_pio_task() handles the rest. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1142 | * otherwise, interrupt handler takes over from here. |
| 1143 | */ |
| 1144 | break; |
| 1145 | |
| 1146 | case HSM_ST: |
| 1147 | /* complete command or read/write the data register */ |
| 1148 | if (qc->tf.protocol == ATAPI_PROT_PIO) { |
| 1149 | /* ATAPI PIO protocol */ |
| 1150 | if ((status & ATA_DRQ) == 0) { |
| 1151 | /* No more data to transfer or device error. |
| 1152 | * Device error will be tagged in HSM_ST_LAST. |
| 1153 | */ |
| 1154 | ap->hsm_task_state = HSM_ST_LAST; |
| 1155 | goto fsm_start; |
| 1156 | } |
| 1157 | |
| 1158 | /* Device should not ask for data transfer (DRQ=1) |
| 1159 | * when it finds something wrong. |
| 1160 | * We ignore DRQ here and stop the HSM by |
| 1161 | * changing hsm_task_state to HSM_ST_ERR and |
| 1162 | * let the EH abort the command or reset the device. |
| 1163 | */ |
| 1164 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1165 | ata_ehi_push_desc(ehi, "ST-ATAPI: " |
| 1166 | "DRQ=1 with device error, " |
| 1167 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1168 | qc->err_mask |= AC_ERR_HSM; |
| 1169 | ap->hsm_task_state = HSM_ST_ERR; |
| 1170 | goto fsm_start; |
| 1171 | } |
| 1172 | |
| 1173 | atapi_pio_bytes(qc); |
| 1174 | |
| 1175 | if (unlikely(ap->hsm_task_state == HSM_ST_ERR)) |
| 1176 | /* bad ireason reported by device */ |
| 1177 | goto fsm_start; |
| 1178 | |
| 1179 | } else { |
| 1180 | /* ATA PIO protocol */ |
| 1181 | if (unlikely((status & ATA_DRQ) == 0)) { |
| 1182 | /* handle BSY=0, DRQ=0 as error */ |
Tejun Heo | 6a6b97d | 2008-11-13 10:04:46 +0900 | [diff] [blame] | 1183 | if (likely(status & (ATA_ERR | ATA_DF))) { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1184 | /* device stops HSM for abort/error */ |
| 1185 | qc->err_mask |= AC_ERR_DEV; |
Tejun Heo | 6a6b97d | 2008-11-13 10:04:46 +0900 | [diff] [blame] | 1186 | |
| 1187 | /* If diagnostic failed and this is |
| 1188 | * IDENTIFY, it's likely a phantom |
| 1189 | * device. Mark hint. |
| 1190 | */ |
| 1191 | if (qc->dev->horkage & |
| 1192 | ATA_HORKAGE_DIAGNOSTIC) |
| 1193 | qc->err_mask |= |
| 1194 | AC_ERR_NODEV_HINT; |
| 1195 | } else { |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1196 | /* HSM violation. Let EH handle this. |
| 1197 | * Phantom devices also trigger this |
| 1198 | * condition. Mark hint. |
| 1199 | */ |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1200 | ata_ehi_push_desc(ehi, "ST-ATA: " |
Tejun Heo | 80ee6f5 | 2009-01-23 14:12:59 +0900 | [diff] [blame] | 1201 | "DRQ=0 without device error, " |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1202 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1203 | qc->err_mask |= AC_ERR_HSM | |
| 1204 | AC_ERR_NODEV_HINT; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1205 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1206 | |
| 1207 | ap->hsm_task_state = HSM_ST_ERR; |
| 1208 | goto fsm_start; |
| 1209 | } |
| 1210 | |
| 1211 | /* For PIO reads, some devices may ask for |
| 1212 | * data transfer (DRQ=1) alone with ERR=1. |
| 1213 | * We respect DRQ here and transfer one |
| 1214 | * block of junk data before changing the |
| 1215 | * hsm_task_state to HSM_ST_ERR. |
| 1216 | * |
| 1217 | * For PIO writes, ERR=1 DRQ=1 doesn't make |
| 1218 | * sense since the data block has been |
| 1219 | * transferred to the device. |
| 1220 | */ |
| 1221 | if (unlikely(status & (ATA_ERR | ATA_DF))) { |
| 1222 | /* data might be corrputed */ |
| 1223 | qc->err_mask |= AC_ERR_DEV; |
| 1224 | |
| 1225 | if (!(qc->tf.flags & ATA_TFLAG_WRITE)) { |
| 1226 | ata_pio_sectors(qc); |
| 1227 | status = ata_wait_idle(ap); |
| 1228 | } |
| 1229 | |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1230 | if (status & (ATA_BUSY | ATA_DRQ)) { |
| 1231 | ata_ehi_push_desc(ehi, "ST-ATA: " |
| 1232 | "BUSY|DRQ persists on ERR|DF, " |
| 1233 | "dev_stat 0x%X", status); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1234 | qc->err_mask |= AC_ERR_HSM; |
Tejun Heo | a836d3e | 2008-06-28 01:39:43 +0900 | [diff] [blame] | 1235 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1236 | |
Tejun Heo | b919930 | 2009-01-25 10:26:00 +0900 | [diff] [blame] | 1237 | /* There are oddball controllers with |
| 1238 | * status register stuck at 0x7f and |
| 1239 | * lbal/m/h at zero which makes it |
| 1240 | * pass all other presence detection |
| 1241 | * mechanisms we have. Set NODEV_HINT |
| 1242 | * for it. Kernel bz#7241. |
| 1243 | */ |
| 1244 | if (status == 0x7f) |
| 1245 | qc->err_mask |= AC_ERR_NODEV_HINT; |
| 1246 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1247 | /* ata_pio_sectors() might change the |
| 1248 | * state to HSM_ST_LAST. so, the state |
| 1249 | * is changed after ata_pio_sectors(). |
| 1250 | */ |
| 1251 | ap->hsm_task_state = HSM_ST_ERR; |
| 1252 | goto fsm_start; |
| 1253 | } |
| 1254 | |
| 1255 | ata_pio_sectors(qc); |
| 1256 | |
| 1257 | if (ap->hsm_task_state == HSM_ST_LAST && |
| 1258 | (!(qc->tf.flags & ATA_TFLAG_WRITE))) { |
| 1259 | /* all data read */ |
| 1260 | status = ata_wait_idle(ap); |
| 1261 | goto fsm_start; |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | poll_next = 1; |
| 1266 | break; |
| 1267 | |
| 1268 | case HSM_ST_LAST: |
| 1269 | if (unlikely(!ata_ok(status))) { |
| 1270 | qc->err_mask |= __ac_err_mask(status); |
| 1271 | ap->hsm_task_state = HSM_ST_ERR; |
| 1272 | goto fsm_start; |
| 1273 | } |
| 1274 | |
| 1275 | /* no more data to transfer */ |
| 1276 | DPRINTK("ata%u: dev %u command complete, drv_stat 0x%x\n", |
| 1277 | ap->print_id, qc->dev->devno, status); |
| 1278 | |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1279 | WARN_ON_ONCE(qc->err_mask & (AC_ERR_DEV | AC_ERR_HSM)); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1280 | |
| 1281 | ap->hsm_task_state = HSM_ST_IDLE; |
| 1282 | |
| 1283 | /* complete taskfile transaction */ |
| 1284 | ata_hsm_qc_complete(qc, in_wq); |
| 1285 | |
| 1286 | poll_next = 0; |
| 1287 | break; |
| 1288 | |
| 1289 | case HSM_ST_ERR: |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1290 | ap->hsm_task_state = HSM_ST_IDLE; |
| 1291 | |
| 1292 | /* complete taskfile transaction */ |
| 1293 | ata_hsm_qc_complete(qc, in_wq); |
| 1294 | |
| 1295 | poll_next = 0; |
| 1296 | break; |
| 1297 | default: |
| 1298 | poll_next = 0; |
| 1299 | BUG(); |
| 1300 | } |
| 1301 | |
| 1302 | return poll_next; |
| 1303 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1304 | EXPORT_SYMBOL_GPL(ata_sff_hsm_move); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1305 | |
Viresh Kumar | 64b9759 | 2011-02-22 14:32:38 +0530 | [diff] [blame] | 1306 | void ata_sff_queue_work(struct work_struct *work) |
| 1307 | { |
| 1308 | queue_work(ata_sff_wq, work); |
| 1309 | } |
| 1310 | EXPORT_SYMBOL_GPL(ata_sff_queue_work); |
| 1311 | |
| 1312 | void ata_sff_queue_delayed_work(struct delayed_work *dwork, unsigned long delay) |
| 1313 | { |
| 1314 | queue_delayed_work(ata_sff_wq, dwork, delay); |
| 1315 | } |
| 1316 | EXPORT_SYMBOL_GPL(ata_sff_queue_delayed_work); |
| 1317 | |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1318 | void ata_sff_queue_pio_task(struct ata_link *link, unsigned long delay) |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1319 | { |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1320 | struct ata_port *ap = link->ap; |
| 1321 | |
| 1322 | WARN_ON((ap->sff_pio_task_link != NULL) && |
| 1323 | (ap->sff_pio_task_link != link)); |
| 1324 | ap->sff_pio_task_link = link; |
| 1325 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1326 | /* may fail if ata_sff_flush_pio_task() in progress */ |
Viresh Kumar | 64b9759 | 2011-02-22 14:32:38 +0530 | [diff] [blame] | 1327 | ata_sff_queue_delayed_work(&ap->sff_pio_task, msecs_to_jiffies(delay)); |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1328 | } |
| 1329 | EXPORT_SYMBOL_GPL(ata_sff_queue_pio_task); |
| 1330 | |
| 1331 | void ata_sff_flush_pio_task(struct ata_port *ap) |
| 1332 | { |
| 1333 | DPRINTK("ENTER\n"); |
| 1334 | |
Tejun Heo | afe2c51 | 2010-12-14 16:21:17 +0100 | [diff] [blame] | 1335 | cancel_delayed_work_sync(&ap->sff_pio_task); |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1336 | ap->hsm_task_state = HSM_ST_IDLE; |
Gwendal Grignou | d4d8eaf | 2011-07-22 13:48:32 -0700 | [diff] [blame] | 1337 | ap->sff_pio_task_link = NULL; |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1338 | |
| 1339 | if (ata_msg_ctl(ap)) |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 1340 | ata_port_dbg(ap, "%s: EXIT\n", __func__); |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1341 | } |
| 1342 | |
| 1343 | static void ata_sff_pio_task(struct work_struct *work) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1344 | { |
| 1345 | struct ata_port *ap = |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1346 | container_of(work, struct ata_port, sff_pio_task.work); |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1347 | struct ata_link *link = ap->sff_pio_task_link; |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1348 | struct ata_queued_cmd *qc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1349 | u8 status; |
| 1350 | int poll_next; |
| 1351 | |
Jeff Garzik | 4fca377 | 2011-02-15 01:13:24 -0500 | [diff] [blame] | 1352 | BUG_ON(ap->sff_pio_task_link == NULL); |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1353 | /* qc can be NULL if timeout occurred */ |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1354 | qc = ata_qc_from_tag(ap, link->active_tag); |
| 1355 | if (!qc) { |
| 1356 | ap->sff_pio_task_link = NULL; |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1357 | return; |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1358 | } |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1359 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1360 | fsm_start: |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1361 | WARN_ON_ONCE(ap->hsm_task_state == HSM_ST_IDLE); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1362 | |
| 1363 | /* |
| 1364 | * This is purely heuristic. This is a fast path. |
| 1365 | * Sometimes when we enter, BSY will be cleared in |
| 1366 | * a chk-status or two. If not, the drive is probably seeking |
| 1367 | * or something. Snooze for a couple msecs, then |
| 1368 | * chk-status again. If still busy, queue delayed work. |
| 1369 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1370 | status = ata_sff_busy_wait(ap, ATA_BUSY, 5); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1371 | if (status & ATA_BUSY) { |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 1372 | ata_msleep(ap, 2); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1373 | status = ata_sff_busy_wait(ap, ATA_BUSY, 10); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1374 | if (status & ATA_BUSY) { |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1375 | ata_sff_queue_pio_task(link, ATA_SHORT_PAUSE); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1376 | return; |
| 1377 | } |
| 1378 | } |
| 1379 | |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1380 | /* |
| 1381 | * hsm_move() may trigger another command to be processed. |
| 1382 | * clean the link beforehand. |
| 1383 | */ |
| 1384 | ap->sff_pio_task_link = NULL; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1385 | /* move the HSM */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1386 | poll_next = ata_sff_hsm_move(ap, qc, status, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1387 | |
| 1388 | /* another command or interrupt handler |
| 1389 | * may be running at this point. |
| 1390 | */ |
| 1391 | if (poll_next) |
| 1392 | goto fsm_start; |
| 1393 | } |
| 1394 | |
| 1395 | /** |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1396 | * ata_sff_qc_issue - issue taskfile to a SFF controller |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1397 | * @qc: command to issue to device |
| 1398 | * |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1399 | * This function issues a PIO or NODATA command to a SFF |
| 1400 | * controller. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1401 | * |
| 1402 | * LOCKING: |
| 1403 | * spin_lock_irqsave(host lock) |
| 1404 | * |
| 1405 | * RETURNS: |
| 1406 | * Zero on success, AC_ERR_* mask on failure |
| 1407 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1408 | unsigned int ata_sff_qc_issue(struct ata_queued_cmd *qc) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1409 | { |
| 1410 | struct ata_port *ap = qc->ap; |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1411 | struct ata_link *link = qc->dev->link; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1412 | |
| 1413 | /* Use polling pio if the LLD doesn't handle |
| 1414 | * interrupt driven pio and atapi CDB interrupt. |
| 1415 | */ |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 1416 | if (ap->flags & ATA_FLAG_PIO_POLLING) |
| 1417 | qc->tf.flags |= ATA_TFLAG_POLLING; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1418 | |
| 1419 | /* select the device */ |
| 1420 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 1421 | |
| 1422 | /* start the command */ |
| 1423 | switch (qc->tf.protocol) { |
| 1424 | case ATA_PROT_NODATA: |
| 1425 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1426 | ata_qc_set_polling(qc); |
| 1427 | |
| 1428 | ata_tf_to_host(ap, &qc->tf); |
| 1429 | ap->hsm_task_state = HSM_ST_LAST; |
| 1430 | |
| 1431 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1432 | ata_sff_queue_pio_task(link, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1433 | |
| 1434 | break; |
| 1435 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1436 | case ATA_PROT_PIO: |
| 1437 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1438 | ata_qc_set_polling(qc); |
| 1439 | |
| 1440 | ata_tf_to_host(ap, &qc->tf); |
| 1441 | |
| 1442 | if (qc->tf.flags & ATA_TFLAG_WRITE) { |
| 1443 | /* PIO data out protocol */ |
| 1444 | ap->hsm_task_state = HSM_ST_FIRST; |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1445 | ata_sff_queue_pio_task(link, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1446 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1447 | /* always send first data block using the |
| 1448 | * ata_sff_pio_task() codepath. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1449 | */ |
| 1450 | } else { |
| 1451 | /* PIO data in protocol */ |
| 1452 | ap->hsm_task_state = HSM_ST; |
| 1453 | |
| 1454 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1455 | ata_sff_queue_pio_task(link, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1456 | |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 1457 | /* if polling, ata_sff_pio_task() handles the |
| 1458 | * rest. otherwise, interrupt handler takes |
| 1459 | * over from here. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1460 | */ |
| 1461 | } |
| 1462 | |
| 1463 | break; |
| 1464 | |
| 1465 | case ATAPI_PROT_PIO: |
| 1466 | case ATAPI_PROT_NODATA: |
| 1467 | if (qc->tf.flags & ATA_TFLAG_POLLING) |
| 1468 | ata_qc_set_polling(qc); |
| 1469 | |
| 1470 | ata_tf_to_host(ap, &qc->tf); |
| 1471 | |
| 1472 | ap->hsm_task_state = HSM_ST_FIRST; |
| 1473 | |
| 1474 | /* send cdb by polling if no cdb interrupt */ |
| 1475 | if ((!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) || |
| 1476 | (qc->tf.flags & ATA_TFLAG_POLLING)) |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 1477 | ata_sff_queue_pio_task(link, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1478 | break; |
| 1479 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1480 | default: |
Tejun Heo | efcb3cf | 2009-01-09 19:19:14 +0900 | [diff] [blame] | 1481 | WARN_ON_ONCE(1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1482 | return AC_ERR_SYSTEM; |
| 1483 | } |
| 1484 | |
| 1485 | return 0; |
| 1486 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1487 | EXPORT_SYMBOL_GPL(ata_sff_qc_issue); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1488 | |
| 1489 | /** |
Tejun Heo | 22183bf | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 1490 | * ata_sff_qc_fill_rtf - fill result TF using ->sff_tf_read |
| 1491 | * @qc: qc to fill result TF for |
| 1492 | * |
| 1493 | * @qc is finished and result TF needs to be filled. Fill it |
| 1494 | * using ->sff_tf_read. |
| 1495 | * |
| 1496 | * LOCKING: |
| 1497 | * spin_lock_irqsave(host lock) |
| 1498 | * |
| 1499 | * RETURNS: |
| 1500 | * true indicating that result TF is successfully filled. |
| 1501 | */ |
| 1502 | bool ata_sff_qc_fill_rtf(struct ata_queued_cmd *qc) |
| 1503 | { |
| 1504 | qc->ap->ops->sff_tf_read(qc->ap, &qc->result_tf); |
| 1505 | return true; |
| 1506 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1507 | EXPORT_SYMBOL_GPL(ata_sff_qc_fill_rtf); |
Tejun Heo | 22183bf | 2008-04-07 22:47:20 +0900 | [diff] [blame] | 1508 | |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1509 | static unsigned int ata_sff_idle_irq(struct ata_port *ap) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1510 | { |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1511 | ap->stats.idle_irq++; |
| 1512 | |
| 1513 | #ifdef ATA_IRQ_TRAP |
| 1514 | if ((ap->stats.idle_irq % 1000) == 0) { |
| 1515 | ap->ops->sff_check_status(ap); |
| 1516 | if (ap->ops->sff_irq_clear) |
| 1517 | ap->ops->sff_irq_clear(ap); |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 1518 | ata_port_warn(ap, "irq trap\n"); |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1519 | return 1; |
| 1520 | } |
| 1521 | #endif |
| 1522 | return 0; /* irq not handled */ |
| 1523 | } |
| 1524 | |
| 1525 | static unsigned int __ata_sff_port_intr(struct ata_port *ap, |
| 1526 | struct ata_queued_cmd *qc, |
| 1527 | bool hsmv_on_idle) |
| 1528 | { |
| 1529 | u8 status; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1530 | |
| 1531 | VPRINTK("ata%u: protocol %d task_state %d\n", |
| 1532 | ap->print_id, qc->tf.protocol, ap->hsm_task_state); |
| 1533 | |
| 1534 | /* Check whether we are expecting interrupt in this state */ |
| 1535 | switch (ap->hsm_task_state) { |
| 1536 | case HSM_ST_FIRST: |
| 1537 | /* Some pre-ATAPI-4 devices assert INTRQ |
| 1538 | * at this state when ready to receive CDB. |
| 1539 | */ |
| 1540 | |
| 1541 | /* Check the ATA_DFLAG_CDB_INTR flag is enough here. |
| 1542 | * The flag was turned on only for atapi devices. No |
| 1543 | * need to check ata_is_atapi(qc->tf.protocol) again. |
| 1544 | */ |
| 1545 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1546 | return ata_sff_idle_irq(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1547 | break; |
Tejun Heo | 687a993 | 2010-12-03 15:19:13 +0100 | [diff] [blame] | 1548 | case HSM_ST_IDLE: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1549 | return ata_sff_idle_irq(ap); |
Tejun Heo | 687a993 | 2010-12-03 15:19:13 +0100 | [diff] [blame] | 1550 | default: |
| 1551 | break; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1552 | } |
| 1553 | |
Alan Cox | a57c1ba | 2008-05-29 22:10:58 +0100 | [diff] [blame] | 1554 | /* check main status, clearing INTRQ if needed */ |
| 1555 | status = ata_sff_irq_status(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1556 | if (status & ATA_BUSY) { |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1557 | if (hsmv_on_idle) { |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1558 | /* BMDMA engine is already stopped, we're screwed */ |
| 1559 | qc->err_mask |= AC_ERR_HSM; |
| 1560 | ap->hsm_task_state = HSM_ST_ERR; |
| 1561 | } else |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1562 | return ata_sff_idle_irq(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1563 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1564 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 1565 | /* clear irq events */ |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1566 | if (ap->ops->sff_irq_clear) |
| 1567 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1568 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1569 | ata_sff_hsm_move(ap, qc, status, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1570 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1571 | return 1; /* irq handled */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1572 | } |
| 1573 | |
| 1574 | /** |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1575 | * ata_sff_port_intr - Handle SFF port interrupt |
| 1576 | * @ap: Port on which interrupt arrived (possibly...) |
| 1577 | * @qc: Taskfile currently active in engine |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1578 | * |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1579 | * Handle port interrupt for given queued command. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1580 | * |
| 1581 | * LOCKING: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1582 | * spin_lock_irqsave(host lock) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1583 | * |
| 1584 | * RETURNS: |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1585 | * One if interrupt was handled, zero if not (shared irq). |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1586 | */ |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1587 | unsigned int ata_sff_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 1588 | { |
| 1589 | return __ata_sff_port_intr(ap, qc, false); |
| 1590 | } |
| 1591 | EXPORT_SYMBOL_GPL(ata_sff_port_intr); |
| 1592 | |
| 1593 | static inline irqreturn_t __ata_sff_interrupt(int irq, void *dev_instance, |
| 1594 | unsigned int (*port_intr)(struct ata_port *, struct ata_queued_cmd *)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1595 | { |
| 1596 | struct ata_host *host = dev_instance; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1597 | bool retried = false; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1598 | unsigned int i; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1599 | unsigned int handled, idle, polling; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1600 | unsigned long flags; |
| 1601 | |
| 1602 | /* TODO: make _irqsave conditional on x86 PCI IDE legacy mode */ |
| 1603 | spin_lock_irqsave(&host->lock, flags); |
| 1604 | |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1605 | retry: |
| 1606 | handled = idle = polling = 0; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1607 | for (i = 0; i < host->n_ports; i++) { |
Tejun Heo | d88ec2e | 2010-01-19 10:46:32 +0900 | [diff] [blame] | 1608 | struct ata_port *ap = host->ports[i]; |
| 1609 | struct ata_queued_cmd *qc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1610 | |
Tejun Heo | d88ec2e | 2010-01-19 10:46:32 +0900 | [diff] [blame] | 1611 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1612 | if (qc) { |
| 1613 | if (!(qc->tf.flags & ATA_TFLAG_POLLING)) |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1614 | handled |= port_intr(ap, qc); |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1615 | else |
| 1616 | polling |= 1 << i; |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1617 | } else |
| 1618 | idle |= 1 << i; |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1619 | } |
| 1620 | |
| 1621 | /* |
| 1622 | * If no port was expecting IRQ but the controller is actually |
| 1623 | * asserting IRQ line, nobody cared will ensue. Check IRQ |
| 1624 | * pending status if available and clear spurious IRQ. |
| 1625 | */ |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1626 | if (!handled && !retried) { |
| 1627 | bool retry = false; |
| 1628 | |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1629 | for (i = 0; i < host->n_ports; i++) { |
| 1630 | struct ata_port *ap = host->ports[i]; |
| 1631 | |
| 1632 | if (polling & (1 << i)) |
| 1633 | continue; |
| 1634 | |
| 1635 | if (!ap->ops->sff_irq_check || |
| 1636 | !ap->ops->sff_irq_check(ap)) |
| 1637 | continue; |
| 1638 | |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1639 | if (idle & (1 << i)) { |
| 1640 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1641 | if (ap->ops->sff_irq_clear) |
| 1642 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 332ac7f | 2010-03-23 12:24:08 +0900 | [diff] [blame] | 1643 | } else { |
| 1644 | /* clear INTRQ and check if BUSY cleared */ |
| 1645 | if (!(ap->ops->sff_check_status(ap) & ATA_BUSY)) |
| 1646 | retry |= true; |
| 1647 | /* |
| 1648 | * With command in flight, we can't do |
| 1649 | * sff_irq_clear() w/o racing with completion. |
| 1650 | */ |
| 1651 | } |
| 1652 | } |
| 1653 | |
| 1654 | if (retry) { |
| 1655 | retried = true; |
| 1656 | goto retry; |
Tejun Heo | 2794362 | 2010-01-19 10:49:19 +0900 | [diff] [blame] | 1657 | } |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1658 | } |
| 1659 | |
| 1660 | spin_unlock_irqrestore(&host->lock, flags); |
| 1661 | |
| 1662 | return IRQ_RETVAL(handled); |
| 1663 | } |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1664 | |
| 1665 | /** |
| 1666 | * ata_sff_interrupt - Default SFF ATA host interrupt handler |
| 1667 | * @irq: irq line (unused) |
| 1668 | * @dev_instance: pointer to our ata_host information structure |
| 1669 | * |
| 1670 | * Default interrupt handler for PCI IDE devices. Calls |
| 1671 | * ata_sff_port_intr() for each port that is not disabled. |
| 1672 | * |
| 1673 | * LOCKING: |
| 1674 | * Obtains host lock during operation. |
| 1675 | * |
| 1676 | * RETURNS: |
| 1677 | * IRQ_NONE or IRQ_HANDLED. |
| 1678 | */ |
| 1679 | irqreturn_t ata_sff_interrupt(int irq, void *dev_instance) |
| 1680 | { |
| 1681 | return __ata_sff_interrupt(irq, dev_instance, ata_sff_port_intr); |
| 1682 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1683 | EXPORT_SYMBOL_GPL(ata_sff_interrupt); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1684 | |
| 1685 | /** |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1686 | * ata_sff_lost_interrupt - Check for an apparent lost interrupt |
| 1687 | * @ap: port that appears to have timed out |
| 1688 | * |
| 1689 | * Called from the libata error handlers when the core code suspects |
| 1690 | * an interrupt has been lost. If it has complete anything we can and |
| 1691 | * then return. Interface must support altstatus for this faster |
| 1692 | * recovery to occur. |
| 1693 | * |
| 1694 | * Locking: |
| 1695 | * Caller holds host lock |
| 1696 | */ |
| 1697 | |
| 1698 | void ata_sff_lost_interrupt(struct ata_port *ap) |
| 1699 | { |
| 1700 | u8 status; |
| 1701 | struct ata_queued_cmd *qc; |
| 1702 | |
| 1703 | /* Only one outstanding command per SFF channel */ |
| 1704 | qc = ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 3e4ec34 | 2010-05-10 21:41:30 +0200 | [diff] [blame] | 1705 | /* We cannot lose an interrupt on a non-existent or polled command */ |
| 1706 | if (!qc || qc->tf.flags & ATA_TFLAG_POLLING) |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1707 | return; |
| 1708 | /* See if the controller thinks it is still busy - if so the command |
| 1709 | isn't a lost IRQ but is still in progress */ |
| 1710 | status = ata_sff_altstatus(ap); |
| 1711 | if (status & ATA_BUSY) |
| 1712 | return; |
| 1713 | |
| 1714 | /* There was a command running, we are no longer busy and we have |
| 1715 | no interrupt. */ |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 1716 | ata_port_warn(ap, "lost interrupt (Status 0x%x)\n", |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1717 | status); |
| 1718 | /* Run the host interrupt logic as if the interrupt had not been |
| 1719 | lost */ |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 1720 | ata_sff_port_intr(ap, qc); |
Alan Cox | c96f173 | 2009-03-24 10:23:46 +0000 | [diff] [blame] | 1721 | } |
| 1722 | EXPORT_SYMBOL_GPL(ata_sff_lost_interrupt); |
| 1723 | |
| 1724 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1725 | * ata_sff_freeze - Freeze SFF controller port |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1726 | * @ap: port to freeze |
| 1727 | * |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 1728 | * Freeze SFF controller port. |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1729 | * |
| 1730 | * LOCKING: |
| 1731 | * Inherited from caller. |
| 1732 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1733 | void ata_sff_freeze(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1734 | { |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1735 | ap->ctl |= ATA_NIEN; |
| 1736 | ap->last_ctl = ap->ctl; |
| 1737 | |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 1738 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) |
| 1739 | ata_sff_set_devctl(ap, ap->ctl); |
Tejun Heo | 0f0a3ad | 2006-11-17 12:24:22 +0900 | [diff] [blame] | 1740 | |
| 1741 | /* Under certain circumstances, some controllers raise IRQ on |
| 1742 | * ATA_NIEN manipulation. Also, many controllers fail to mask |
| 1743 | * previously pending IRQ on ATA_NIEN assertion. Clear it. |
| 1744 | */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1745 | ap->ops->sff_check_status(ap); |
Tejun Heo | 0f0a3ad | 2006-11-17 12:24:22 +0900 | [diff] [blame] | 1746 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1747 | if (ap->ops->sff_irq_clear) |
| 1748 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1749 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1750 | EXPORT_SYMBOL_GPL(ata_sff_freeze); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1751 | |
| 1752 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1753 | * ata_sff_thaw - Thaw SFF controller port |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1754 | * @ap: port to thaw |
| 1755 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1756 | * Thaw SFF controller port. |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1757 | * |
| 1758 | * LOCKING: |
| 1759 | * Inherited from caller. |
| 1760 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1761 | void ata_sff_thaw(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1762 | { |
| 1763 | /* clear & re-enable interrupts */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1764 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 1765 | if (ap->ops->sff_irq_clear) |
| 1766 | ap->ops->sff_irq_clear(ap); |
Sergei Shtylyov | e42a542 | 2010-05-07 22:49:02 +0400 | [diff] [blame] | 1767 | ata_sff_irq_on(ap); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1768 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1769 | EXPORT_SYMBOL_GPL(ata_sff_thaw); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 1770 | |
| 1771 | /** |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1772 | * ata_sff_prereset - prepare SFF link for reset |
| 1773 | * @link: SFF link to be reset |
| 1774 | * @deadline: deadline jiffies for the operation |
| 1775 | * |
| 1776 | * SFF link @link is about to be reset. Initialize it. It first |
| 1777 | * calls ata_std_prereset() and wait for !BSY if the port is |
| 1778 | * being softreset. |
| 1779 | * |
| 1780 | * LOCKING: |
| 1781 | * Kernel thread context (may sleep) |
| 1782 | * |
| 1783 | * RETURNS: |
| 1784 | * 0 on success, -errno otherwise. |
| 1785 | */ |
| 1786 | int ata_sff_prereset(struct ata_link *link, unsigned long deadline) |
| 1787 | { |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1788 | struct ata_eh_context *ehc = &link->eh_context; |
| 1789 | int rc; |
| 1790 | |
| 1791 | rc = ata_std_prereset(link, deadline); |
| 1792 | if (rc) |
| 1793 | return rc; |
| 1794 | |
| 1795 | /* if we're about to do hardreset, nothing more to do */ |
| 1796 | if (ehc->i.action & ATA_EH_HARDRESET) |
| 1797 | return 0; |
| 1798 | |
| 1799 | /* wait for !BSY if we don't know that no device is attached */ |
| 1800 | if (!ata_link_offline(link)) { |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1801 | rc = ata_sff_wait_ready(link, deadline); |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1802 | if (rc && rc != -ENODEV) { |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 1803 | ata_link_warn(link, |
| 1804 | "device not ready (errno=%d), forcing hardreset\n", |
| 1805 | rc); |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1806 | ehc->i.action |= ATA_EH_HARDRESET; |
| 1807 | } |
| 1808 | } |
| 1809 | |
| 1810 | return 0; |
| 1811 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1812 | EXPORT_SYMBOL_GPL(ata_sff_prereset); |
Tejun Heo | 0aa1113 | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 1813 | |
| 1814 | /** |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1815 | * ata_devchk - PATA device presence detection |
| 1816 | * @ap: ATA channel to examine |
| 1817 | * @device: Device to examine (starting at zero) |
| 1818 | * |
| 1819 | * This technique was originally described in |
| 1820 | * Hale Landis's ATADRVR (www.ata-atapi.com), and |
| 1821 | * later found its way into the ATA/ATAPI spec. |
| 1822 | * |
| 1823 | * Write a pattern to the ATA shadow registers, |
| 1824 | * and if a device is present, it will respond by |
| 1825 | * correctly storing and echoing back the |
| 1826 | * ATA shadow register contents. |
| 1827 | * |
| 1828 | * LOCKING: |
| 1829 | * caller. |
| 1830 | */ |
| 1831 | static unsigned int ata_devchk(struct ata_port *ap, unsigned int device) |
| 1832 | { |
| 1833 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1834 | u8 nsect, lbal; |
| 1835 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1836 | ap->ops->sff_dev_select(ap, device); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1837 | |
| 1838 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1839 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1840 | |
| 1841 | iowrite8(0xaa, ioaddr->nsect_addr); |
| 1842 | iowrite8(0x55, ioaddr->lbal_addr); |
| 1843 | |
| 1844 | iowrite8(0x55, ioaddr->nsect_addr); |
| 1845 | iowrite8(0xaa, ioaddr->lbal_addr); |
| 1846 | |
| 1847 | nsect = ioread8(ioaddr->nsect_addr); |
| 1848 | lbal = ioread8(ioaddr->lbal_addr); |
| 1849 | |
| 1850 | if ((nsect == 0x55) && (lbal == 0xaa)) |
| 1851 | return 1; /* we found a device */ |
| 1852 | |
| 1853 | return 0; /* nothing found */ |
| 1854 | } |
| 1855 | |
| 1856 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1857 | * ata_sff_dev_classify - Parse returned ATA device signature |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1858 | * @dev: ATA device to classify (starting at zero) |
| 1859 | * @present: device seems present |
| 1860 | * @r_err: Value of error register on completion |
| 1861 | * |
| 1862 | * After an event -- SRST, E.D.D., or SATA COMRESET -- occurs, |
| 1863 | * an ATA/ATAPI-defined set of values is placed in the ATA |
| 1864 | * shadow registers, indicating the results of device detection |
| 1865 | * and diagnostics. |
| 1866 | * |
| 1867 | * Select the ATA device, and read the values from the ATA shadow |
| 1868 | * registers. Then parse according to the Error register value, |
| 1869 | * and the spec-defined values examined by ata_dev_classify(). |
| 1870 | * |
| 1871 | * LOCKING: |
| 1872 | * caller. |
| 1873 | * |
| 1874 | * RETURNS: |
| 1875 | * Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE. |
| 1876 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1877 | unsigned int ata_sff_dev_classify(struct ata_device *dev, int present, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1878 | u8 *r_err) |
| 1879 | { |
| 1880 | struct ata_port *ap = dev->link->ap; |
| 1881 | struct ata_taskfile tf; |
| 1882 | unsigned int class; |
| 1883 | u8 err; |
| 1884 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1885 | ap->ops->sff_dev_select(ap, dev->devno); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1886 | |
| 1887 | memset(&tf, 0, sizeof(tf)); |
| 1888 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1889 | ap->ops->sff_tf_read(ap, &tf); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1890 | err = tf.feature; |
| 1891 | if (r_err) |
| 1892 | *r_err = err; |
| 1893 | |
| 1894 | /* see if device passed diags: continue and warn later */ |
| 1895 | if (err == 0) |
| 1896 | /* diagnostic fail : do nothing _YET_ */ |
| 1897 | dev->horkage |= ATA_HORKAGE_DIAGNOSTIC; |
| 1898 | else if (err == 1) |
| 1899 | /* do nothing */ ; |
| 1900 | else if ((dev->devno == 0) && (err == 0x81)) |
| 1901 | /* do nothing */ ; |
| 1902 | else |
| 1903 | return ATA_DEV_NONE; |
| 1904 | |
| 1905 | /* determine if device is ATA or ATAPI */ |
| 1906 | class = ata_dev_classify(&tf); |
| 1907 | |
| 1908 | if (class == ATA_DEV_UNKNOWN) { |
| 1909 | /* If the device failed diagnostic, it's likely to |
| 1910 | * have reported incorrect device signature too. |
| 1911 | * Assume ATA device if the device seems present but |
| 1912 | * device signature is invalid with diagnostic |
| 1913 | * failure. |
| 1914 | */ |
| 1915 | if (present && (dev->horkage & ATA_HORKAGE_DIAGNOSTIC)) |
| 1916 | class = ATA_DEV_ATA; |
| 1917 | else |
| 1918 | class = ATA_DEV_NONE; |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1919 | } else if ((class == ATA_DEV_ATA) && |
| 1920 | (ap->ops->sff_check_status(ap) == 0)) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1921 | class = ATA_DEV_NONE; |
| 1922 | |
| 1923 | return class; |
| 1924 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 1925 | EXPORT_SYMBOL_GPL(ata_sff_dev_classify); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1926 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1927 | /** |
| 1928 | * ata_sff_wait_after_reset - wait for devices to become ready after reset |
| 1929 | * @link: SFF link which is just reset |
| 1930 | * @devmask: mask of present devices |
| 1931 | * @deadline: deadline jiffies for the operation |
| 1932 | * |
| 1933 | * Wait devices attached to SFF @link to become ready after |
| 1934 | * reset. It contains preceding 150ms wait to avoid accessing TF |
| 1935 | * status register too early. |
| 1936 | * |
| 1937 | * LOCKING: |
| 1938 | * Kernel thread context (may sleep). |
| 1939 | * |
| 1940 | * RETURNS: |
| 1941 | * 0 on success, -ENODEV if some or all of devices in @devmask |
| 1942 | * don't seem to exist. -errno on other errors. |
| 1943 | */ |
| 1944 | int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask, |
| 1945 | unsigned long deadline) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1946 | { |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1947 | struct ata_port *ap = link->ap; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1948 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 1949 | unsigned int dev0 = devmask & (1 << 0); |
| 1950 | unsigned int dev1 = devmask & (1 << 1); |
| 1951 | int rc, ret = 0; |
| 1952 | |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 1953 | ata_msleep(ap, ATA_WAIT_AFTER_RESET); |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1954 | |
| 1955 | /* always check readiness of the master device */ |
| 1956 | rc = ata_sff_wait_ready(link, deadline); |
| 1957 | /* -ENODEV means the odd clown forgot the D7 pulldown resistor |
| 1958 | * and TF status is 0xff, bail out on it too. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1959 | */ |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1960 | if (rc) |
| 1961 | return rc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1962 | |
| 1963 | /* if device 1 was found in ata_devchk, wait for register |
| 1964 | * access briefly, then wait for BSY to clear. |
| 1965 | */ |
| 1966 | if (dev1) { |
| 1967 | int i; |
| 1968 | |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1969 | ap->ops->sff_dev_select(ap, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1970 | |
| 1971 | /* Wait for register access. Some ATAPI devices fail |
| 1972 | * to set nsect/lbal after reset, so don't waste too |
| 1973 | * much time on it. We're gonna wait for !BSY anyway. |
| 1974 | */ |
| 1975 | for (i = 0; i < 2; i++) { |
| 1976 | u8 nsect, lbal; |
| 1977 | |
| 1978 | nsect = ioread8(ioaddr->nsect_addr); |
| 1979 | lbal = ioread8(ioaddr->lbal_addr); |
| 1980 | if ((nsect == 1) && (lbal == 1)) |
| 1981 | break; |
Tejun Heo | 97750ce | 2010-09-06 17:56:29 +0200 | [diff] [blame] | 1982 | ata_msleep(ap, 50); /* give drive a breather */ |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1983 | } |
| 1984 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 1985 | rc = ata_sff_wait_ready(link, deadline); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1986 | if (rc) { |
| 1987 | if (rc != -ENODEV) |
| 1988 | return rc; |
| 1989 | ret = rc; |
| 1990 | } |
| 1991 | } |
| 1992 | |
| 1993 | /* is all this really necessary? */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1994 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1995 | if (dev1) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1996 | ap->ops->sff_dev_select(ap, 1); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1997 | if (dev0) |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 1998 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 1999 | |
| 2000 | return ret; |
| 2001 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2002 | EXPORT_SYMBOL_GPL(ata_sff_wait_after_reset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2003 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2004 | static int ata_bus_softreset(struct ata_port *ap, unsigned int devmask, |
| 2005 | unsigned long deadline) |
| 2006 | { |
| 2007 | struct ata_ioports *ioaddr = &ap->ioaddr; |
| 2008 | |
| 2009 | DPRINTK("ata%u: bus reset via SRST\n", ap->print_id); |
| 2010 | |
| 2011 | /* software reset. causes dev0 to be selected */ |
| 2012 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
| 2013 | udelay(20); /* FIXME: flush */ |
| 2014 | iowrite8(ap->ctl | ATA_SRST, ioaddr->ctl_addr); |
| 2015 | udelay(20); /* FIXME: flush */ |
| 2016 | iowrite8(ap->ctl, ioaddr->ctl_addr); |
Stuart MENEFY | e3e4385 | 2009-03-10 11:38:13 +0000 | [diff] [blame] | 2017 | ap->last_ctl = ap->ctl; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2018 | |
Tejun Heo | 705e76b | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2019 | /* wait the port to become ready */ |
| 2020 | return ata_sff_wait_after_reset(&ap->link, devmask, deadline); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2021 | } |
| 2022 | |
| 2023 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2024 | * ata_sff_softreset - reset host port via ATA SRST |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2025 | * @link: ATA link to reset |
| 2026 | * @classes: resulting classes of attached devices |
| 2027 | * @deadline: deadline jiffies for the operation |
| 2028 | * |
| 2029 | * Reset host port using ATA SRST. |
| 2030 | * |
| 2031 | * LOCKING: |
| 2032 | * Kernel thread context (may sleep) |
| 2033 | * |
| 2034 | * RETURNS: |
| 2035 | * 0 on success, -errno otherwise. |
| 2036 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2037 | int ata_sff_softreset(struct ata_link *link, unsigned int *classes, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2038 | unsigned long deadline) |
| 2039 | { |
| 2040 | struct ata_port *ap = link->ap; |
| 2041 | unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS; |
| 2042 | unsigned int devmask = 0; |
| 2043 | int rc; |
| 2044 | u8 err; |
| 2045 | |
| 2046 | DPRINTK("ENTER\n"); |
| 2047 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2048 | /* determine if device 0/1 are present */ |
| 2049 | if (ata_devchk(ap, 0)) |
| 2050 | devmask |= (1 << 0); |
| 2051 | if (slave_possible && ata_devchk(ap, 1)) |
| 2052 | devmask |= (1 << 1); |
| 2053 | |
| 2054 | /* select device 0 again */ |
Tejun Heo | 5682ed3 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2055 | ap->ops->sff_dev_select(ap, 0); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2056 | |
| 2057 | /* issue bus reset */ |
| 2058 | DPRINTK("about to softreset, devmask=%x\n", devmask); |
| 2059 | rc = ata_bus_softreset(ap, devmask, deadline); |
| 2060 | /* if link is occupied, -ENODEV too is an error */ |
| 2061 | if (rc && (rc != -ENODEV || sata_scr_valid(link))) { |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 2062 | ata_link_err(link, "SRST failed (errno=%d)\n", rc); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2063 | return rc; |
| 2064 | } |
| 2065 | |
| 2066 | /* determine by signature whether we have ATA or ATAPI devices */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2067 | classes[0] = ata_sff_dev_classify(&link->device[0], |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2068 | devmask & (1 << 0), &err); |
| 2069 | if (slave_possible && err != 0x81) |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2070 | classes[1] = ata_sff_dev_classify(&link->device[1], |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2071 | devmask & (1 << 1), &err); |
| 2072 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2073 | DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]); |
| 2074 | return 0; |
| 2075 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2076 | EXPORT_SYMBOL_GPL(ata_sff_softreset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2077 | |
| 2078 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2079 | * sata_sff_hardreset - reset host port via SATA phy reset |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2080 | * @link: link to reset |
| 2081 | * @class: resulting class of attached device |
| 2082 | * @deadline: deadline jiffies for the operation |
| 2083 | * |
| 2084 | * SATA phy-reset host port using DET bits of SControl register, |
| 2085 | * wait for !BSY and classify the attached device. |
| 2086 | * |
| 2087 | * LOCKING: |
| 2088 | * Kernel thread context (may sleep) |
| 2089 | * |
| 2090 | * RETURNS: |
| 2091 | * 0 on success, -errno otherwise. |
| 2092 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2093 | int sata_sff_hardreset(struct ata_link *link, unsigned int *class, |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2094 | unsigned long deadline) |
| 2095 | { |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2096 | struct ata_eh_context *ehc = &link->eh_context; |
| 2097 | const unsigned long *timing = sata_ehc_deb_timing(ehc); |
| 2098 | bool online; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2099 | int rc; |
| 2100 | |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2101 | rc = sata_link_hardreset(link, timing, deadline, &online, |
| 2102 | ata_sff_check_ready); |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2103 | if (online) |
| 2104 | *class = ata_sff_dev_classify(link->device, 1, NULL); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2105 | |
| 2106 | DPRINTK("EXIT, class=%u\n", *class); |
Tejun Heo | 9dadd45 | 2008-04-07 22:47:19 +0900 | [diff] [blame] | 2107 | return rc; |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2108 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2109 | EXPORT_SYMBOL_GPL(sata_sff_hardreset); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2110 | |
| 2111 | /** |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2112 | * ata_sff_postreset - SFF postreset callback |
| 2113 | * @link: the target SFF ata_link |
| 2114 | * @classes: classes of attached devices |
| 2115 | * |
| 2116 | * This function is invoked after a successful reset. It first |
| 2117 | * calls ata_std_postreset() and performs SFF specific postreset |
| 2118 | * processing. |
| 2119 | * |
| 2120 | * LOCKING: |
| 2121 | * Kernel thread context (may sleep) |
| 2122 | */ |
| 2123 | void ata_sff_postreset(struct ata_link *link, unsigned int *classes) |
| 2124 | { |
| 2125 | struct ata_port *ap = link->ap; |
| 2126 | |
| 2127 | ata_std_postreset(link, classes); |
| 2128 | |
| 2129 | /* is double-select really necessary? */ |
| 2130 | if (classes[0] != ATA_DEV_NONE) |
| 2131 | ap->ops->sff_dev_select(ap, 1); |
| 2132 | if (classes[1] != ATA_DEV_NONE) |
| 2133 | ap->ops->sff_dev_select(ap, 0); |
| 2134 | |
| 2135 | /* bail out if no device is present */ |
| 2136 | if (classes[0] == ATA_DEV_NONE && classes[1] == ATA_DEV_NONE) { |
| 2137 | DPRINTK("EXIT, no device\n"); |
| 2138 | return; |
| 2139 | } |
| 2140 | |
| 2141 | /* set up device control */ |
Sergei Shtylyov | 41dec29 | 2010-05-07 22:47:50 +0400 | [diff] [blame] | 2142 | if (ap->ops->sff_set_devctl || ap->ioaddr.ctl_addr) { |
| 2143 | ata_sff_set_devctl(ap, ap->ctl); |
Stuart MENEFY | e3e4385 | 2009-03-10 11:38:13 +0000 | [diff] [blame] | 2144 | ap->last_ctl = ap->ctl; |
| 2145 | } |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2146 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2147 | EXPORT_SYMBOL_GPL(ata_sff_postreset); |
Tejun Heo | 203c75b | 2008-04-07 22:47:18 +0900 | [diff] [blame] | 2148 | |
| 2149 | /** |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2150 | * ata_sff_drain_fifo - Stock FIFO drain logic for SFF controllers |
| 2151 | * @qc: command |
| 2152 | * |
| 2153 | * Drain the FIFO and device of any stuck data following a command |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 2154 | * failing to complete. In some cases this is necessary before a |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2155 | * reset will recover the device. |
| 2156 | * |
| 2157 | */ |
| 2158 | |
| 2159 | void ata_sff_drain_fifo(struct ata_queued_cmd *qc) |
| 2160 | { |
| 2161 | int count; |
| 2162 | struct ata_port *ap; |
| 2163 | |
| 2164 | /* We only need to flush incoming data when a command was running */ |
| 2165 | if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE) |
| 2166 | return; |
| 2167 | |
| 2168 | ap = qc->ap; |
| 2169 | /* Drain up to 64K of data before we give up this recovery method */ |
| 2170 | for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) |
Robert Hancock | 9a8fd68 | 2009-12-08 20:48:10 -0600 | [diff] [blame] | 2171 | && count < 65536; count += 2) |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2172 | ioread16(ap->ioaddr.data_addr); |
| 2173 | |
| 2174 | /* Can become DEBUG later */ |
| 2175 | if (count) |
Joe Perches | a9a79df | 2011-04-15 15:51:59 -0700 | [diff] [blame] | 2176 | ata_port_dbg(ap, "drained %d bytes to clear DRQ\n", count); |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2177 | |
| 2178 | } |
| 2179 | EXPORT_SYMBOL_GPL(ata_sff_drain_fifo); |
| 2180 | |
| 2181 | /** |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2182 | * ata_sff_error_handler - Stock error handler for SFF controller |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2183 | * @ap: port to handle error for |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2184 | * |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2185 | * Stock error handler for SFF controller. It can handle both |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2186 | * PATA and SATA controllers. Many controllers should be able to |
| 2187 | * use this EH as-is or with some added handling before and |
| 2188 | * after. |
| 2189 | * |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2190 | * LOCKING: |
| 2191 | * Kernel thread context (may sleep) |
| 2192 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2193 | void ata_sff_error_handler(struct ata_port *ap) |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2194 | { |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2195 | ata_reset_fn_t softreset = ap->ops->softreset; |
| 2196 | ata_reset_fn_t hardreset = ap->ops->hardreset; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2197 | struct ata_queued_cmd *qc; |
| 2198 | unsigned long flags; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2199 | |
Tejun Heo | 9af5c9c | 2007-08-06 18:36:22 +0900 | [diff] [blame] | 2200 | qc = __ata_qc_from_tag(ap, ap->link.active_tag); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2201 | if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) |
| 2202 | qc = NULL; |
| 2203 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 2204 | spin_lock_irqsave(ap->lock, flags); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2205 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2206 | /* |
| 2207 | * We *MUST* do FIFO draining before we issue a reset as |
| 2208 | * several devices helpfully clear their internal state and |
| 2209 | * will lock solid if we touch the data port post reset. Pass |
| 2210 | * qc in case anyone wants to do different PIO/DMA recovery or |
| 2211 | * has per command fixups |
Alan Cox | 3d47aa8 | 2009-03-24 10:23:19 +0000 | [diff] [blame] | 2212 | */ |
Tejun Heo | 8244cd0 | 2010-05-10 21:41:36 +0200 | [diff] [blame] | 2213 | if (ap->ops->sff_drain_fifo) |
| 2214 | ap->ops->sff_drain_fifo(qc); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2215 | |
Jeff Garzik | ba6a130 | 2006-06-22 23:46:10 -0400 | [diff] [blame] | 2216 | spin_unlock_irqrestore(ap->lock, flags); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2217 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2218 | /* ignore ata_sff_softreset if ctl isn't accessible */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2219 | if (softreset == ata_sff_softreset && !ap->ioaddr.ctl_addr) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2220 | softreset = NULL; |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2221 | |
| 2222 | /* ignore built-in hardresets if SCR access is not available */ |
| 2223 | if ((hardreset == sata_std_hardreset || |
| 2224 | hardreset == sata_sff_hardreset) && !sata_scr_valid(&ap->link)) |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2225 | hardreset = NULL; |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2226 | |
Tejun Heo | a1efdab | 2008-03-25 12:22:50 +0900 | [diff] [blame] | 2227 | ata_do_eh(ap, ap->ops->prereset, softreset, hardreset, |
| 2228 | ap->ops->postreset); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2229 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2230 | EXPORT_SYMBOL_GPL(ata_sff_error_handler); |
Tejun Heo | 6d97dbd | 2006-05-15 20:58:24 +0900 | [diff] [blame] | 2231 | |
| 2232 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2233 | * ata_sff_std_ports - initialize ioaddr with standard port offsets. |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2234 | * @ioaddr: IO address structure to be initialized |
| 2235 | * |
| 2236 | * Utility function which initializes data_addr, error_addr, |
| 2237 | * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr, |
| 2238 | * device_addr, status_addr, and command_addr to standard offsets |
| 2239 | * relative to cmd_addr. |
| 2240 | * |
| 2241 | * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr. |
| 2242 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2243 | void ata_sff_std_ports(struct ata_ioports *ioaddr) |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2244 | { |
| 2245 | ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA; |
| 2246 | ioaddr->error_addr = ioaddr->cmd_addr + ATA_REG_ERR; |
| 2247 | ioaddr->feature_addr = ioaddr->cmd_addr + ATA_REG_FEATURE; |
| 2248 | ioaddr->nsect_addr = ioaddr->cmd_addr + ATA_REG_NSECT; |
| 2249 | ioaddr->lbal_addr = ioaddr->cmd_addr + ATA_REG_LBAL; |
| 2250 | ioaddr->lbam_addr = ioaddr->cmd_addr + ATA_REG_LBAM; |
| 2251 | ioaddr->lbah_addr = ioaddr->cmd_addr + ATA_REG_LBAH; |
| 2252 | ioaddr->device_addr = ioaddr->cmd_addr + ATA_REG_DEVICE; |
| 2253 | ioaddr->status_addr = ioaddr->cmd_addr + ATA_REG_STATUS; |
| 2254 | ioaddr->command_addr = ioaddr->cmd_addr + ATA_REG_CMD; |
| 2255 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2256 | EXPORT_SYMBOL_GPL(ata_sff_std_ports); |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2257 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2258 | #ifdef CONFIG_PCI |
Alan | 4112e16 | 2007-01-08 12:10:05 +0000 | [diff] [blame] | 2259 | |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 2260 | static int ata_resources_present(struct pci_dev *pdev, int port) |
| 2261 | { |
| 2262 | int i; |
| 2263 | |
| 2264 | /* Check the PCI resources for this channel are enabled */ |
| 2265 | port = port * 2; |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2266 | for (i = 0; i < 2; i++) { |
Tejun Heo | 272f788 | 2008-03-25 22:16:40 +0900 | [diff] [blame] | 2267 | if (pci_resource_start(pdev, port + i) == 0 || |
| 2268 | pci_resource_len(pdev, port + i) == 0) |
| 2269 | return 0; |
| 2270 | } |
| 2271 | return 1; |
| 2272 | } |
| 2273 | |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2274 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2275 | * ata_pci_sff_init_host - acquire native PCI ATA resources and init host |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2276 | * @host: target ATA host |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2277 | * |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2278 | * Acquire native PCI ATA resources for @host and initialize the |
| 2279 | * first two ports of @host accordingly. Ports marked dummy are |
| 2280 | * skipped and allocation failure makes the port dummy. |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2281 | * |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 2282 | * Note that native PCI resources are valid even for legacy hosts |
| 2283 | * as we fix up pdev resources array early in boot, so this |
| 2284 | * function can be used for both native and legacy SFF hosts. |
| 2285 | * |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2286 | * LOCKING: |
| 2287 | * Inherited from calling layer (may sleep). |
| 2288 | * |
| 2289 | * RETURNS: |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2290 | * 0 if at least one port is initialized, -ENODEV if no port is |
| 2291 | * available. |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2292 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2293 | int ata_pci_sff_init_host(struct ata_host *host) |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2294 | { |
| 2295 | struct device *gdev = host->dev; |
| 2296 | struct pci_dev *pdev = to_pci_dev(gdev); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2297 | unsigned int mask = 0; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2298 | int i, rc; |
| 2299 | |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2300 | /* request, iomap BARs and init port addresses accordingly */ |
| 2301 | for (i = 0; i < 2; i++) { |
| 2302 | struct ata_port *ap = host->ports[i]; |
| 2303 | int base = i * 2; |
| 2304 | void __iomem * const *iomap; |
| 2305 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2306 | if (ata_port_is_dummy(ap)) |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2307 | continue; |
| 2308 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2309 | /* Discard disabled ports. Some controllers show |
| 2310 | * their unused channels this way. Disabled ports are |
| 2311 | * made dummy. |
| 2312 | */ |
| 2313 | if (!ata_resources_present(pdev, i)) { |
| 2314 | ap->ops = &ata_dummy_port_ops; |
| 2315 | continue; |
| 2316 | } |
| 2317 | |
Tejun Heo | 35a10a8 | 2008-01-04 18:42:21 +0900 | [diff] [blame] | 2318 | rc = pcim_iomap_regions(pdev, 0x3 << base, |
| 2319 | dev_driver_string(gdev)); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2320 | if (rc) { |
Joe Perches | a44fec1 | 2011-04-15 15:51:58 -0700 | [diff] [blame] | 2321 | dev_warn(gdev, |
| 2322 | "failed to request/iomap BARs for port %d (errno=%d)\n", |
| 2323 | i, rc); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2324 | if (rc == -EBUSY) |
| 2325 | pcim_pin_device(pdev); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2326 | ap->ops = &ata_dummy_port_ops; |
| 2327 | continue; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2328 | } |
| 2329 | host->iomap = iomap = pcim_iomap_table(pdev); |
| 2330 | |
| 2331 | ap->ioaddr.cmd_addr = iomap[base]; |
| 2332 | ap->ioaddr.altstatus_addr = |
| 2333 | ap->ioaddr.ctl_addr = (void __iomem *) |
| 2334 | ((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS); |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2335 | ata_sff_std_ports(&ap->ioaddr); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2336 | |
Tejun Heo | cbcdd87 | 2007-08-18 13:14:55 +0900 | [diff] [blame] | 2337 | ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx", |
| 2338 | (unsigned long long)pci_resource_start(pdev, base), |
| 2339 | (unsigned long long)pci_resource_start(pdev, base + 1)); |
| 2340 | |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2341 | mask |= 1 << i; |
| 2342 | } |
| 2343 | |
| 2344 | if (!mask) { |
Joe Perches | a44fec1 | 2011-04-15 15:51:58 -0700 | [diff] [blame] | 2345 | dev_err(gdev, "no available native port\n"); |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2346 | return -ENODEV; |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2347 | } |
| 2348 | |
| 2349 | return 0; |
| 2350 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2351 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_host); |
Tejun Heo | d491b27 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2352 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2353 | /** |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2354 | * ata_pci_sff_prepare_host - helper to prepare PCI PIO-only SFF ATA host |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2355 | * @pdev: target PCI device |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2356 | * @ppi: array of port_info, must be enough for two ports |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2357 | * @r_host: out argument for the initialized ATA host |
| 2358 | * |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2359 | * Helper to allocate PIO-only SFF ATA host for @pdev, acquire |
| 2360 | * all PCI resources and initialize it accordingly in one go. |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2361 | * |
| 2362 | * LOCKING: |
| 2363 | * Inherited from calling layer (may sleep). |
| 2364 | * |
| 2365 | * RETURNS: |
| 2366 | * 0 on success, -errno otherwise. |
| 2367 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2368 | int ata_pci_sff_prepare_host(struct pci_dev *pdev, |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2369 | const struct ata_port_info * const *ppi, |
Tejun Heo | d583bc1 | 2007-07-04 18:02:07 +0900 | [diff] [blame] | 2370 | struct ata_host **r_host) |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2371 | { |
| 2372 | struct ata_host *host; |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2373 | int rc; |
| 2374 | |
| 2375 | if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) |
| 2376 | return -ENOMEM; |
| 2377 | |
| 2378 | host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); |
| 2379 | if (!host) { |
Joe Perches | a44fec1 | 2011-04-15 15:51:58 -0700 | [diff] [blame] | 2380 | dev_err(&pdev->dev, "failed to allocate ATA host\n"); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2381 | rc = -ENOMEM; |
| 2382 | goto err_out; |
| 2383 | } |
| 2384 | |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2385 | rc = ata_pci_sff_init_host(host); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2386 | if (rc) |
| 2387 | goto err_out; |
| 2388 | |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2389 | devres_remove_group(&pdev->dev, NULL); |
| 2390 | *r_host = host; |
| 2391 | return 0; |
| 2392 | |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2393 | err_out: |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2394 | devres_release_group(&pdev->dev, NULL); |
| 2395 | return rc; |
| 2396 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2397 | EXPORT_SYMBOL_GPL(ata_pci_sff_prepare_host); |
Tejun Heo | 21b0ad4 | 2007-04-17 23:44:07 +0900 | [diff] [blame] | 2398 | |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2399 | /** |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2400 | * ata_pci_sff_activate_host - start SFF host, request IRQ and register it |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2401 | * @host: target SFF ATA host |
| 2402 | * @irq_handler: irq_handler used when requesting IRQ(s) |
| 2403 | * @sht: scsi_host_template to use when registering the host |
| 2404 | * |
| 2405 | * This is the counterpart of ata_host_activate() for SFF ATA |
| 2406 | * hosts. This separate helper is necessary because SFF hosts |
| 2407 | * use two separate interrupts in legacy mode. |
| 2408 | * |
| 2409 | * LOCKING: |
| 2410 | * Inherited from calling layer (may sleep). |
| 2411 | * |
| 2412 | * RETURNS: |
| 2413 | * 0 on success, -errno otherwise. |
| 2414 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2415 | int ata_pci_sff_activate_host(struct ata_host *host, |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2416 | irq_handler_t irq_handler, |
| 2417 | struct scsi_host_template *sht) |
| 2418 | { |
| 2419 | struct device *dev = host->dev; |
| 2420 | struct pci_dev *pdev = to_pci_dev(dev); |
| 2421 | const char *drv_name = dev_driver_string(host->dev); |
| 2422 | int legacy_mode = 0, rc; |
| 2423 | |
| 2424 | rc = ata_host_start(host); |
| 2425 | if (rc) |
| 2426 | return rc; |
| 2427 | |
| 2428 | if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { |
| 2429 | u8 tmp8, mask; |
| 2430 | |
| 2431 | /* TODO: What if one channel is in native mode ... */ |
| 2432 | pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); |
| 2433 | mask = (1 << 2) | (1 << 0); |
| 2434 | if ((tmp8 & mask) != mask) |
| 2435 | legacy_mode = 1; |
| 2436 | #if defined(CONFIG_NO_ATA_LEGACY) |
| 2437 | /* Some platforms with PCI limits cannot address compat |
| 2438 | port space. In that case we punt if their firmware has |
| 2439 | left a device in compatibility mode */ |
| 2440 | if (legacy_mode) { |
| 2441 | printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); |
| 2442 | return -EOPNOTSUPP; |
| 2443 | } |
| 2444 | #endif |
| 2445 | } |
| 2446 | |
| 2447 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 2448 | return -ENOMEM; |
| 2449 | |
| 2450 | if (!legacy_mode && pdev->irq) { |
James Bottomley | af649a1 | 2011-04-24 14:31:33 -0500 | [diff] [blame] | 2451 | int i; |
| 2452 | |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2453 | rc = devm_request_irq(dev, pdev->irq, irq_handler, |
| 2454 | IRQF_SHARED, drv_name, host); |
| 2455 | if (rc) |
| 2456 | goto out; |
| 2457 | |
James Bottomley | af649a1 | 2011-04-24 14:31:33 -0500 | [diff] [blame] | 2458 | for (i = 0; i < 2; i++) { |
| 2459 | if (ata_port_is_dummy(host->ports[i])) |
| 2460 | continue; |
| 2461 | ata_port_desc(host->ports[i], "irq %d", pdev->irq); |
| 2462 | } |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2463 | } else if (legacy_mode) { |
| 2464 | if (!ata_port_is_dummy(host->ports[0])) { |
| 2465 | rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev), |
| 2466 | irq_handler, IRQF_SHARED, |
| 2467 | drv_name, host); |
| 2468 | if (rc) |
| 2469 | goto out; |
| 2470 | |
| 2471 | ata_port_desc(host->ports[0], "irq %d", |
| 2472 | ATA_PRIMARY_IRQ(pdev)); |
| 2473 | } |
| 2474 | |
| 2475 | if (!ata_port_is_dummy(host->ports[1])) { |
| 2476 | rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev), |
| 2477 | irq_handler, IRQF_SHARED, |
| 2478 | drv_name, host); |
| 2479 | if (rc) |
| 2480 | goto out; |
| 2481 | |
| 2482 | ata_port_desc(host->ports[1], "irq %d", |
| 2483 | ATA_SECONDARY_IRQ(pdev)); |
| 2484 | } |
| 2485 | } |
| 2486 | |
| 2487 | rc = ata_host_register(host, sht); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2488 | out: |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2489 | if (rc == 0) |
| 2490 | devres_remove_group(dev, NULL); |
| 2491 | else |
| 2492 | devres_release_group(dev, NULL); |
| 2493 | |
| 2494 | return rc; |
| 2495 | } |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2496 | EXPORT_SYMBOL_GPL(ata_pci_sff_activate_host); |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2497 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2498 | static const struct ata_port_info *ata_sff_find_valid_pi( |
| 2499 | const struct ata_port_info * const *ppi) |
| 2500 | { |
| 2501 | int i; |
| 2502 | |
| 2503 | /* look up the first valid port_info */ |
| 2504 | for (i = 0; i < 2 && ppi[i]; i++) |
| 2505 | if (ppi[i]->port_ops != &ata_dummy_port_ops) |
| 2506 | return ppi[i]; |
| 2507 | |
| 2508 | return NULL; |
| 2509 | } |
| 2510 | |
Bartlomiej Zolnierkiewicz | c203603 | 2011-10-11 19:22:16 +0200 | [diff] [blame] | 2511 | static int ata_pci_init_one(struct pci_dev *pdev, |
| 2512 | const struct ata_port_info * const *ppi, |
| 2513 | struct scsi_host_template *sht, void *host_priv, |
| 2514 | int hflags, bool bmdma) |
| 2515 | { |
| 2516 | struct device *dev = &pdev->dev; |
| 2517 | const struct ata_port_info *pi; |
| 2518 | struct ata_host *host = NULL; |
| 2519 | int rc; |
| 2520 | |
| 2521 | DPRINTK("ENTER\n"); |
| 2522 | |
| 2523 | pi = ata_sff_find_valid_pi(ppi); |
| 2524 | if (!pi) { |
| 2525 | dev_err(&pdev->dev, "no valid port_info specified\n"); |
| 2526 | return -EINVAL; |
| 2527 | } |
| 2528 | |
| 2529 | if (!devres_open_group(dev, NULL, GFP_KERNEL)) |
| 2530 | return -ENOMEM; |
| 2531 | |
| 2532 | rc = pcim_enable_device(pdev); |
| 2533 | if (rc) |
| 2534 | goto out; |
| 2535 | |
| 2536 | if (bmdma) |
| 2537 | /* prepare and activate BMDMA host */ |
| 2538 | rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host); |
| 2539 | else |
| 2540 | /* prepare and activate SFF host */ |
| 2541 | rc = ata_pci_sff_prepare_host(pdev, ppi, &host); |
| 2542 | if (rc) |
| 2543 | goto out; |
| 2544 | host->private_data = host_priv; |
| 2545 | host->flags |= hflags; |
| 2546 | |
| 2547 | if (bmdma) { |
| 2548 | pci_set_master(pdev); |
| 2549 | rc = ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht); |
| 2550 | } else |
| 2551 | rc = ata_pci_sff_activate_host(host, ata_sff_interrupt, sht); |
| 2552 | out: |
| 2553 | if (rc == 0) |
| 2554 | devres_remove_group(&pdev->dev, NULL); |
| 2555 | else |
| 2556 | devres_release_group(&pdev->dev, NULL); |
| 2557 | |
| 2558 | return rc; |
| 2559 | } |
| 2560 | |
Tejun Heo | 4e6b79f | 2008-01-18 18:36:28 +0900 | [diff] [blame] | 2561 | /** |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2562 | * ata_pci_sff_init_one - Initialize/register PIO-only PCI IDE controller |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2563 | * @pdev: Controller to be initialized |
Tejun Heo | 1626aeb | 2007-05-04 12:43:58 +0200 | [diff] [blame] | 2564 | * @ppi: array of port_info, must be enough for two ports |
Tejun Heo | 1bd5b71 | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 2565 | * @sht: scsi_host_template to use when registering the host |
Tejun Heo | 887125e | 2008-03-25 12:22:49 +0900 | [diff] [blame] | 2566 | * @host_priv: host private_data |
Alan Cox | 16ea0fc | 2010-02-23 02:26:06 -0500 | [diff] [blame] | 2567 | * @hflag: host flags |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2568 | * |
| 2569 | * This is a helper function which can be called from a driver's |
| 2570 | * xxx_init_one() probe function if the hardware uses traditional |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 2571 | * IDE taskfile registers and is PIO only. |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2572 | * |
Alan Cox | 2ec7df0 | 2006-08-10 16:59:10 +0900 | [diff] [blame] | 2573 | * ASSUMPTION: |
| 2574 | * Nobody makes a single channel controller that appears solely as |
| 2575 | * the secondary legacy port on PCI. |
| 2576 | * |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2577 | * LOCKING: |
| 2578 | * Inherited from PCI layer (may sleep). |
| 2579 | * |
| 2580 | * RETURNS: |
| 2581 | * Zero on success, negative on errno-based value on error. |
| 2582 | */ |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2583 | int ata_pci_sff_init_one(struct pci_dev *pdev, |
Alan Cox | 16ea0fc | 2010-02-23 02:26:06 -0500 | [diff] [blame] | 2584 | const struct ata_port_info * const *ppi, |
| 2585 | struct scsi_host_template *sht, void *host_priv, int hflag) |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2586 | { |
Bartlomiej Zolnierkiewicz | c203603 | 2011-10-11 19:22:16 +0200 | [diff] [blame] | 2587 | return ata_pci_init_one(pdev, ppi, sht, host_priv, hflag, 0); |
Jeff Garzik | 1fdffbc | 2006-02-09 05:15:27 -0500 | [diff] [blame] | 2588 | } |
Tejun Heo | 9363c38 | 2008-04-07 22:47:16 +0900 | [diff] [blame] | 2589 | EXPORT_SYMBOL_GPL(ata_pci_sff_init_one); |
Alan Cox | 0fe40ff | 2009-01-05 14:16:13 +0000 | [diff] [blame] | 2590 | |
Tejun Heo | 624d5c5 | 2008-03-25 22:16:41 +0900 | [diff] [blame] | 2591 | #endif /* CONFIG_PCI */ |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2592 | |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 2593 | /* |
| 2594 | * BMDMA support |
| 2595 | */ |
| 2596 | |
| 2597 | #ifdef CONFIG_ATA_BMDMA |
| 2598 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2599 | const struct ata_port_operations ata_bmdma_port_ops = { |
| 2600 | .inherits = &ata_sff_port_ops, |
| 2601 | |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2602 | .error_handler = ata_bmdma_error_handler, |
| 2603 | .post_internal_cmd = ata_bmdma_post_internal_cmd, |
| 2604 | |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2605 | .qc_prep = ata_bmdma_qc_prep, |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2606 | .qc_issue = ata_bmdma_qc_issue, |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2607 | |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2608 | .sff_irq_clear = ata_bmdma_irq_clear, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2609 | .bmdma_setup = ata_bmdma_setup, |
| 2610 | .bmdma_start = ata_bmdma_start, |
| 2611 | .bmdma_stop = ata_bmdma_stop, |
| 2612 | .bmdma_status = ata_bmdma_status, |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 2613 | |
| 2614 | .port_start = ata_bmdma_port_start, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2615 | }; |
| 2616 | EXPORT_SYMBOL_GPL(ata_bmdma_port_ops); |
| 2617 | |
| 2618 | const struct ata_port_operations ata_bmdma32_port_ops = { |
| 2619 | .inherits = &ata_bmdma_port_ops, |
| 2620 | |
| 2621 | .sff_data_xfer = ata_sff_data_xfer32, |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 2622 | .port_start = ata_bmdma_port_start32, |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2623 | }; |
| 2624 | EXPORT_SYMBOL_GPL(ata_bmdma32_port_ops); |
| 2625 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 2626 | /** |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2627 | * ata_bmdma_fill_sg - Fill PCI IDE PRD table |
| 2628 | * @qc: Metadata associated with taskfile to be transferred |
| 2629 | * |
| 2630 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2631 | * associated with the current disk command. |
| 2632 | * |
| 2633 | * LOCKING: |
| 2634 | * spin_lock_irqsave(host lock) |
| 2635 | * |
| 2636 | */ |
| 2637 | static void ata_bmdma_fill_sg(struct ata_queued_cmd *qc) |
| 2638 | { |
| 2639 | struct ata_port *ap = qc->ap; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2640 | struct ata_bmdma_prd *prd = ap->bmdma_prd; |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2641 | struct scatterlist *sg; |
| 2642 | unsigned int si, pi; |
| 2643 | |
| 2644 | pi = 0; |
| 2645 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
| 2646 | u32 addr, offset; |
| 2647 | u32 sg_len, len; |
| 2648 | |
| 2649 | /* determine if physical DMA addr spans 64K boundary. |
| 2650 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2651 | * truncate dma_addr_t to u32. |
| 2652 | */ |
| 2653 | addr = (u32) sg_dma_address(sg); |
| 2654 | sg_len = sg_dma_len(sg); |
| 2655 | |
| 2656 | while (sg_len) { |
| 2657 | offset = addr & 0xffff; |
| 2658 | len = sg_len; |
| 2659 | if ((offset + sg_len) > 0x10000) |
| 2660 | len = 0x10000 - offset; |
| 2661 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2662 | prd[pi].addr = cpu_to_le32(addr); |
| 2663 | prd[pi].flags_len = cpu_to_le32(len & 0xffff); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2664 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
| 2665 | |
| 2666 | pi++; |
| 2667 | sg_len -= len; |
| 2668 | addr += len; |
| 2669 | } |
| 2670 | } |
| 2671 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2672 | prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2673 | } |
| 2674 | |
| 2675 | /** |
| 2676 | * ata_bmdma_fill_sg_dumb - Fill PCI IDE PRD table |
| 2677 | * @qc: Metadata associated with taskfile to be transferred |
| 2678 | * |
| 2679 | * Fill PCI IDE PRD (scatter-gather) table with segments |
| 2680 | * associated with the current disk command. Perform the fill |
| 2681 | * so that we avoid writing any length 64K records for |
| 2682 | * controllers that don't follow the spec. |
| 2683 | * |
| 2684 | * LOCKING: |
| 2685 | * spin_lock_irqsave(host lock) |
| 2686 | * |
| 2687 | */ |
| 2688 | static void ata_bmdma_fill_sg_dumb(struct ata_queued_cmd *qc) |
| 2689 | { |
| 2690 | struct ata_port *ap = qc->ap; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2691 | struct ata_bmdma_prd *prd = ap->bmdma_prd; |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2692 | struct scatterlist *sg; |
| 2693 | unsigned int si, pi; |
| 2694 | |
| 2695 | pi = 0; |
| 2696 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
| 2697 | u32 addr, offset; |
| 2698 | u32 sg_len, len, blen; |
| 2699 | |
| 2700 | /* determine if physical DMA addr spans 64K boundary. |
| 2701 | * Note h/w doesn't support 64-bit, so we unconditionally |
| 2702 | * truncate dma_addr_t to u32. |
| 2703 | */ |
| 2704 | addr = (u32) sg_dma_address(sg); |
| 2705 | sg_len = sg_dma_len(sg); |
| 2706 | |
| 2707 | while (sg_len) { |
| 2708 | offset = addr & 0xffff; |
| 2709 | len = sg_len; |
| 2710 | if ((offset + sg_len) > 0x10000) |
| 2711 | len = 0x10000 - offset; |
| 2712 | |
| 2713 | blen = len & 0xffff; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2714 | prd[pi].addr = cpu_to_le32(addr); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2715 | if (blen == 0) { |
| 2716 | /* Some PATA chipsets like the CS5530 can't |
| 2717 | cope with 0x0000 meaning 64K as the spec |
| 2718 | says */ |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2719 | prd[pi].flags_len = cpu_to_le32(0x8000); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2720 | blen = 0x8000; |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2721 | prd[++pi].addr = cpu_to_le32(addr + 0x8000); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2722 | } |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2723 | prd[pi].flags_len = cpu_to_le32(blen); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2724 | VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len); |
| 2725 | |
| 2726 | pi++; |
| 2727 | sg_len -= len; |
| 2728 | addr += len; |
| 2729 | } |
| 2730 | } |
| 2731 | |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 2732 | prd[pi - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT); |
Tejun Heo | f47451c | 2010-05-10 21:41:40 +0200 | [diff] [blame] | 2733 | } |
| 2734 | |
| 2735 | /** |
| 2736 | * ata_bmdma_qc_prep - Prepare taskfile for submission |
| 2737 | * @qc: Metadata associated with taskfile to be prepared |
| 2738 | * |
| 2739 | * Prepare ATA taskfile for submission. |
| 2740 | * |
| 2741 | * LOCKING: |
| 2742 | * spin_lock_irqsave(host lock) |
| 2743 | */ |
| 2744 | void ata_bmdma_qc_prep(struct ata_queued_cmd *qc) |
| 2745 | { |
| 2746 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2747 | return; |
| 2748 | |
| 2749 | ata_bmdma_fill_sg(qc); |
| 2750 | } |
| 2751 | EXPORT_SYMBOL_GPL(ata_bmdma_qc_prep); |
| 2752 | |
| 2753 | /** |
| 2754 | * ata_bmdma_dumb_qc_prep - Prepare taskfile for submission |
| 2755 | * @qc: Metadata associated with taskfile to be prepared |
| 2756 | * |
| 2757 | * Prepare ATA taskfile for submission. |
| 2758 | * |
| 2759 | * LOCKING: |
| 2760 | * spin_lock_irqsave(host lock) |
| 2761 | */ |
| 2762 | void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc) |
| 2763 | { |
| 2764 | if (!(qc->flags & ATA_QCFLAG_DMAMAP)) |
| 2765 | return; |
| 2766 | |
| 2767 | ata_bmdma_fill_sg_dumb(qc); |
| 2768 | } |
| 2769 | EXPORT_SYMBOL_GPL(ata_bmdma_dumb_qc_prep); |
| 2770 | |
| 2771 | /** |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2772 | * ata_bmdma_qc_issue - issue taskfile to a BMDMA controller |
| 2773 | * @qc: command to issue to device |
| 2774 | * |
| 2775 | * This function issues a PIO, NODATA or DMA command to a |
| 2776 | * SFF/BMDMA controller. PIO and NODATA are handled by |
| 2777 | * ata_sff_qc_issue(). |
| 2778 | * |
| 2779 | * LOCKING: |
| 2780 | * spin_lock_irqsave(host lock) |
| 2781 | * |
| 2782 | * RETURNS: |
| 2783 | * Zero on success, AC_ERR_* mask on failure |
| 2784 | */ |
| 2785 | unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc) |
| 2786 | { |
| 2787 | struct ata_port *ap = qc->ap; |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 2788 | struct ata_link *link = qc->dev->link; |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2789 | |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2790 | /* defer PIO handling to sff_qc_issue */ |
| 2791 | if (!ata_is_dma(qc->tf.protocol)) |
| 2792 | return ata_sff_qc_issue(qc); |
| 2793 | |
| 2794 | /* select the device */ |
| 2795 | ata_dev_select(ap, qc->dev->devno, 1, 0); |
| 2796 | |
| 2797 | /* start the command */ |
| 2798 | switch (qc->tf.protocol) { |
| 2799 | case ATA_PROT_DMA: |
| 2800 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
| 2801 | |
| 2802 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
| 2803 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 2804 | ap->ops->bmdma_start(qc); /* initiate bmdma */ |
| 2805 | ap->hsm_task_state = HSM_ST_LAST; |
| 2806 | break; |
| 2807 | |
| 2808 | case ATAPI_PROT_DMA: |
| 2809 | WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING); |
| 2810 | |
| 2811 | ap->ops->sff_tf_load(ap, &qc->tf); /* load tf registers */ |
| 2812 | ap->ops->bmdma_setup(qc); /* set up bmdma */ |
| 2813 | ap->hsm_task_state = HSM_ST_FIRST; |
| 2814 | |
| 2815 | /* send cdb by polling if no cdb interrupt */ |
| 2816 | if (!(qc->dev->flags & ATA_DFLAG_CDB_INTR)) |
Gwendal Grignou | ea3c645 | 2010-08-31 16:20:36 -0700 | [diff] [blame] | 2817 | ata_sff_queue_pio_task(link, 0); |
Tejun Heo | 360ff78 | 2010-05-10 21:41:42 +0200 | [diff] [blame] | 2818 | break; |
| 2819 | |
| 2820 | default: |
| 2821 | WARN_ON(1); |
| 2822 | return AC_ERR_SYSTEM; |
| 2823 | } |
| 2824 | |
| 2825 | return 0; |
| 2826 | } |
| 2827 | EXPORT_SYMBOL_GPL(ata_bmdma_qc_issue); |
| 2828 | |
| 2829 | /** |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 2830 | * ata_bmdma_port_intr - Handle BMDMA port interrupt |
| 2831 | * @ap: Port on which interrupt arrived (possibly...) |
| 2832 | * @qc: Taskfile currently active in engine |
| 2833 | * |
| 2834 | * Handle port interrupt for given queued command. |
| 2835 | * |
| 2836 | * LOCKING: |
| 2837 | * spin_lock_irqsave(host lock) |
| 2838 | * |
| 2839 | * RETURNS: |
| 2840 | * One if interrupt was handled, zero if not (shared irq). |
| 2841 | */ |
| 2842 | unsigned int ata_bmdma_port_intr(struct ata_port *ap, struct ata_queued_cmd *qc) |
| 2843 | { |
| 2844 | struct ata_eh_info *ehi = &ap->link.eh_info; |
| 2845 | u8 host_stat = 0; |
| 2846 | bool bmdma_stopped = false; |
| 2847 | unsigned int handled; |
| 2848 | |
| 2849 | if (ap->hsm_task_state == HSM_ST_LAST && ata_is_dma(qc->tf.protocol)) { |
| 2850 | /* check status of DMA engine */ |
| 2851 | host_stat = ap->ops->bmdma_status(ap); |
| 2852 | VPRINTK("ata%u: host_stat 0x%X\n", ap->print_id, host_stat); |
| 2853 | |
| 2854 | /* if it's not our irq... */ |
| 2855 | if (!(host_stat & ATA_DMA_INTR)) |
| 2856 | return ata_sff_idle_irq(ap); |
| 2857 | |
| 2858 | /* before we do anything else, clear DMA-Start bit */ |
| 2859 | ap->ops->bmdma_stop(qc); |
| 2860 | bmdma_stopped = true; |
| 2861 | |
| 2862 | if (unlikely(host_stat & ATA_DMA_ERR)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2863 | /* error when transferring data to/from memory */ |
Tejun Heo | c3b2889 | 2010-05-19 22:10:21 +0200 | [diff] [blame] | 2864 | qc->err_mask |= AC_ERR_HOST_BUS; |
| 2865 | ap->hsm_task_state = HSM_ST_ERR; |
| 2866 | } |
| 2867 | } |
| 2868 | |
| 2869 | handled = __ata_sff_port_intr(ap, qc, bmdma_stopped); |
| 2870 | |
| 2871 | if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol)) |
| 2872 | ata_ehi_push_desc(ehi, "BMDMA stat 0x%x", host_stat); |
| 2873 | |
| 2874 | return handled; |
| 2875 | } |
| 2876 | EXPORT_SYMBOL_GPL(ata_bmdma_port_intr); |
| 2877 | |
| 2878 | /** |
| 2879 | * ata_bmdma_interrupt - Default BMDMA ATA host interrupt handler |
| 2880 | * @irq: irq line (unused) |
| 2881 | * @dev_instance: pointer to our ata_host information structure |
| 2882 | * |
| 2883 | * Default interrupt handler for PCI IDE devices. Calls |
| 2884 | * ata_bmdma_port_intr() for each port that is not disabled. |
| 2885 | * |
| 2886 | * LOCKING: |
| 2887 | * Obtains host lock during operation. |
| 2888 | * |
| 2889 | * RETURNS: |
| 2890 | * IRQ_NONE or IRQ_HANDLED. |
| 2891 | */ |
| 2892 | irqreturn_t ata_bmdma_interrupt(int irq, void *dev_instance) |
| 2893 | { |
| 2894 | return __ata_sff_interrupt(irq, dev_instance, ata_bmdma_port_intr); |
| 2895 | } |
| 2896 | EXPORT_SYMBOL_GPL(ata_bmdma_interrupt); |
| 2897 | |
| 2898 | /** |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2899 | * ata_bmdma_error_handler - Stock error handler for BMDMA controller |
| 2900 | * @ap: port to handle error for |
| 2901 | * |
| 2902 | * Stock error handler for BMDMA controller. It can handle both |
| 2903 | * PATA and SATA controllers. Most BMDMA controllers should be |
| 2904 | * able to use this EH as-is or with some added handling before |
| 2905 | * and after. |
| 2906 | * |
| 2907 | * LOCKING: |
| 2908 | * Kernel thread context (may sleep) |
| 2909 | */ |
| 2910 | void ata_bmdma_error_handler(struct ata_port *ap) |
| 2911 | { |
| 2912 | struct ata_queued_cmd *qc; |
| 2913 | unsigned long flags; |
| 2914 | bool thaw = false; |
| 2915 | |
| 2916 | qc = __ata_qc_from_tag(ap, ap->link.active_tag); |
| 2917 | if (qc && !(qc->flags & ATA_QCFLAG_FAILED)) |
| 2918 | qc = NULL; |
| 2919 | |
| 2920 | /* reset PIO HSM and stop DMA engine */ |
| 2921 | spin_lock_irqsave(ap->lock, flags); |
| 2922 | |
| 2923 | if (qc && ata_is_dma(qc->tf.protocol)) { |
| 2924 | u8 host_stat; |
| 2925 | |
| 2926 | host_stat = ap->ops->bmdma_status(ap); |
| 2927 | |
| 2928 | /* BMDMA controllers indicate host bus error by |
| 2929 | * setting DMA_ERR bit and timing out. As it wasn't |
| 2930 | * really a timeout event, adjust error mask and |
| 2931 | * cancel frozen state. |
| 2932 | */ |
| 2933 | if (qc->err_mask == AC_ERR_TIMEOUT && (host_stat & ATA_DMA_ERR)) { |
| 2934 | qc->err_mask = AC_ERR_HOST_BUS; |
| 2935 | thaw = true; |
| 2936 | } |
| 2937 | |
| 2938 | ap->ops->bmdma_stop(qc); |
| 2939 | |
| 2940 | /* if we're gonna thaw, make sure IRQ is clear */ |
| 2941 | if (thaw) { |
| 2942 | ap->ops->sff_check_status(ap); |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2943 | if (ap->ops->sff_irq_clear) |
| 2944 | ap->ops->sff_irq_clear(ap); |
Tejun Heo | fe06e5f | 2010-05-10 21:41:39 +0200 | [diff] [blame] | 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | spin_unlock_irqrestore(ap->lock, flags); |
| 2949 | |
| 2950 | if (thaw) |
| 2951 | ata_eh_thaw_port(ap); |
| 2952 | |
| 2953 | ata_sff_error_handler(ap); |
| 2954 | } |
| 2955 | EXPORT_SYMBOL_GPL(ata_bmdma_error_handler); |
| 2956 | |
| 2957 | /** |
| 2958 | * ata_bmdma_post_internal_cmd - Stock post_internal_cmd for BMDMA |
| 2959 | * @qc: internal command to clean up |
| 2960 | * |
| 2961 | * LOCKING: |
| 2962 | * Kernel thread context (may sleep) |
| 2963 | */ |
| 2964 | void ata_bmdma_post_internal_cmd(struct ata_queued_cmd *qc) |
| 2965 | { |
| 2966 | struct ata_port *ap = qc->ap; |
| 2967 | unsigned long flags; |
| 2968 | |
| 2969 | if (ata_is_dma(qc->tf.protocol)) { |
| 2970 | spin_lock_irqsave(ap->lock, flags); |
| 2971 | ap->ops->bmdma_stop(qc); |
| 2972 | spin_unlock_irqrestore(ap->lock, flags); |
| 2973 | } |
| 2974 | } |
| 2975 | EXPORT_SYMBOL_GPL(ata_bmdma_post_internal_cmd); |
| 2976 | |
| 2977 | /** |
Tejun Heo | 37f65b8 | 2010-05-19 22:10:20 +0200 | [diff] [blame] | 2978 | * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt. |
| 2979 | * @ap: Port associated with this ATA transaction. |
| 2980 | * |
| 2981 | * Clear interrupt and error flags in DMA status register. |
| 2982 | * |
| 2983 | * May be used as the irq_clear() entry in ata_port_operations. |
| 2984 | * |
| 2985 | * LOCKING: |
| 2986 | * spin_lock_irqsave(host lock) |
| 2987 | */ |
| 2988 | void ata_bmdma_irq_clear(struct ata_port *ap) |
| 2989 | { |
| 2990 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
| 2991 | |
| 2992 | if (!mmio) |
| 2993 | return; |
| 2994 | |
| 2995 | iowrite8(ioread8(mmio + ATA_DMA_STATUS), mmio + ATA_DMA_STATUS); |
| 2996 | } |
| 2997 | EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear); |
| 2998 | |
| 2999 | /** |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3000 | * ata_bmdma_setup - Set up PCI IDE BMDMA transaction |
| 3001 | * @qc: Info associated with this ATA transaction. |
| 3002 | * |
| 3003 | * LOCKING: |
| 3004 | * spin_lock_irqsave(host lock) |
| 3005 | */ |
| 3006 | void ata_bmdma_setup(struct ata_queued_cmd *qc) |
| 3007 | { |
| 3008 | struct ata_port *ap = qc->ap; |
| 3009 | unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); |
| 3010 | u8 dmactl; |
| 3011 | |
| 3012 | /* load PRD table addr. */ |
| 3013 | mb(); /* make sure PRD table writes are visible to controller */ |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 3014 | iowrite32(ap->bmdma_prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS); |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3015 | |
| 3016 | /* specify data direction, triple-check start bit is clear */ |
| 3017 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3018 | dmactl &= ~(ATA_DMA_WR | ATA_DMA_START); |
| 3019 | if (!rw) |
| 3020 | dmactl |= ATA_DMA_WR; |
| 3021 | iowrite8(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3022 | |
| 3023 | /* issue r/w command */ |
| 3024 | ap->ops->sff_exec_command(ap, &qc->tf); |
| 3025 | } |
| 3026 | EXPORT_SYMBOL_GPL(ata_bmdma_setup); |
| 3027 | |
| 3028 | /** |
| 3029 | * ata_bmdma_start - Start a PCI IDE BMDMA transaction |
| 3030 | * @qc: Info associated with this ATA transaction. |
| 3031 | * |
| 3032 | * LOCKING: |
| 3033 | * spin_lock_irqsave(host lock) |
| 3034 | */ |
| 3035 | void ata_bmdma_start(struct ata_queued_cmd *qc) |
| 3036 | { |
| 3037 | struct ata_port *ap = qc->ap; |
| 3038 | u8 dmactl; |
| 3039 | |
| 3040 | /* start host DMA transaction */ |
| 3041 | dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3042 | iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD); |
| 3043 | |
| 3044 | /* Strictly, one may wish to issue an ioread8() here, to |
| 3045 | * flush the mmio write. However, control also passes |
| 3046 | * to the hardware at this point, and it will interrupt |
| 3047 | * us when we are to resume control. So, in effect, |
| 3048 | * we don't care when the mmio write flushes. |
| 3049 | * Further, a read of the DMA status register _immediately_ |
| 3050 | * following the write may not be what certain flaky hardware |
| 3051 | * is expected, so I think it is best to not add a readb() |
| 3052 | * without first all the MMIO ATA cards/mobos. |
| 3053 | * Or maybe I'm just being paranoid. |
| 3054 | * |
| 3055 | * FIXME: The posting of this write means I/O starts are |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3056 | * unnecessarily delayed for MMIO |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3057 | */ |
| 3058 | } |
| 3059 | EXPORT_SYMBOL_GPL(ata_bmdma_start); |
| 3060 | |
| 3061 | /** |
| 3062 | * ata_bmdma_stop - Stop PCI IDE BMDMA transfer |
| 3063 | * @qc: Command we are ending DMA for |
| 3064 | * |
| 3065 | * Clears the ATA_DMA_START flag in the dma control register |
| 3066 | * |
| 3067 | * May be used as the bmdma_stop() entry in ata_port_operations. |
| 3068 | * |
| 3069 | * LOCKING: |
| 3070 | * spin_lock_irqsave(host lock) |
| 3071 | */ |
| 3072 | void ata_bmdma_stop(struct ata_queued_cmd *qc) |
| 3073 | { |
| 3074 | struct ata_port *ap = qc->ap; |
| 3075 | void __iomem *mmio = ap->ioaddr.bmdma_addr; |
| 3076 | |
| 3077 | /* clear start/stop bit */ |
| 3078 | iowrite8(ioread8(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, |
| 3079 | mmio + ATA_DMA_CMD); |
| 3080 | |
| 3081 | /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ |
| 3082 | ata_sff_dma_pause(ap); |
| 3083 | } |
| 3084 | EXPORT_SYMBOL_GPL(ata_bmdma_stop); |
| 3085 | |
| 3086 | /** |
| 3087 | * ata_bmdma_status - Read PCI IDE BMDMA status |
| 3088 | * @ap: Port associated with this ATA transaction. |
| 3089 | * |
| 3090 | * Read and return BMDMA status register. |
| 3091 | * |
| 3092 | * May be used as the bmdma_status() entry in ata_port_operations. |
| 3093 | * |
| 3094 | * LOCKING: |
| 3095 | * spin_lock_irqsave(host lock) |
| 3096 | */ |
| 3097 | u8 ata_bmdma_status(struct ata_port *ap) |
| 3098 | { |
| 3099 | return ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); |
| 3100 | } |
| 3101 | EXPORT_SYMBOL_GPL(ata_bmdma_status); |
| 3102 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3103 | |
| 3104 | /** |
| 3105 | * ata_bmdma_port_start - Set port up for bmdma. |
| 3106 | * @ap: Port to initialize |
| 3107 | * |
| 3108 | * Called just after data structures for each port are |
| 3109 | * initialized. Allocates space for PRD table. |
| 3110 | * |
| 3111 | * May be used as the port_start() entry in ata_port_operations. |
| 3112 | * |
| 3113 | * LOCKING: |
| 3114 | * Inherited from caller. |
| 3115 | */ |
| 3116 | int ata_bmdma_port_start(struct ata_port *ap) |
| 3117 | { |
| 3118 | if (ap->mwdma_mask || ap->udma_mask) { |
Tejun Heo | f60d701 | 2010-05-10 21:41:41 +0200 | [diff] [blame] | 3119 | ap->bmdma_prd = |
| 3120 | dmam_alloc_coherent(ap->host->dev, ATA_PRD_TBL_SZ, |
| 3121 | &ap->bmdma_prd_dma, GFP_KERNEL); |
| 3122 | if (!ap->bmdma_prd) |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3123 | return -ENOMEM; |
| 3124 | } |
| 3125 | |
| 3126 | return 0; |
| 3127 | } |
| 3128 | EXPORT_SYMBOL_GPL(ata_bmdma_port_start); |
| 3129 | |
| 3130 | /** |
| 3131 | * ata_bmdma_port_start32 - Set port up for dma. |
| 3132 | * @ap: Port to initialize |
| 3133 | * |
| 3134 | * Called just after data structures for each port are |
| 3135 | * initialized. Enables 32bit PIO and allocates space for PRD |
| 3136 | * table. |
| 3137 | * |
| 3138 | * May be used as the port_start() entry in ata_port_operations for |
| 3139 | * devices that are capable of 32bit PIO. |
| 3140 | * |
| 3141 | * LOCKING: |
| 3142 | * Inherited from caller. |
| 3143 | */ |
| 3144 | int ata_bmdma_port_start32(struct ata_port *ap) |
| 3145 | { |
| 3146 | ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE; |
| 3147 | return ata_bmdma_port_start(ap); |
| 3148 | } |
| 3149 | EXPORT_SYMBOL_GPL(ata_bmdma_port_start32); |
| 3150 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3151 | #ifdef CONFIG_PCI |
| 3152 | |
| 3153 | /** |
| 3154 | * ata_pci_bmdma_clear_simplex - attempt to kick device out of simplex |
| 3155 | * @pdev: PCI device |
| 3156 | * |
| 3157 | * Some PCI ATA devices report simplex mode but in fact can be told to |
| 3158 | * enter non simplex mode. This implements the necessary logic to |
| 3159 | * perform the task on such devices. Calling it on other devices will |
| 3160 | * have -undefined- behaviour. |
| 3161 | */ |
| 3162 | int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev) |
| 3163 | { |
| 3164 | unsigned long bmdma = pci_resource_start(pdev, 4); |
| 3165 | u8 simplex; |
| 3166 | |
| 3167 | if (bmdma == 0) |
| 3168 | return -ENOENT; |
| 3169 | |
| 3170 | simplex = inb(bmdma + 0x02); |
| 3171 | outb(simplex & 0x60, bmdma + 0x02); |
| 3172 | simplex = inb(bmdma + 0x02); |
| 3173 | if (simplex & 0x80) |
| 3174 | return -EOPNOTSUPP; |
| 3175 | return 0; |
| 3176 | } |
| 3177 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_clear_simplex); |
| 3178 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3179 | static void ata_bmdma_nodma(struct ata_host *host, const char *reason) |
| 3180 | { |
| 3181 | int i; |
| 3182 | |
Joe Perches | a44fec1 | 2011-04-15 15:51:58 -0700 | [diff] [blame] | 3183 | dev_err(host->dev, "BMDMA: %s, falling back to PIO\n", reason); |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3184 | |
| 3185 | for (i = 0; i < 2; i++) { |
| 3186 | host->ports[i]->mwdma_mask = 0; |
| 3187 | host->ports[i]->udma_mask = 0; |
| 3188 | } |
| 3189 | } |
| 3190 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3191 | /** |
| 3192 | * ata_pci_bmdma_init - acquire PCI BMDMA resources and init ATA host |
| 3193 | * @host: target ATA host |
| 3194 | * |
| 3195 | * Acquire PCI BMDMA resources and initialize @host accordingly. |
| 3196 | * |
| 3197 | * LOCKING: |
| 3198 | * Inherited from calling layer (may sleep). |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3199 | */ |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3200 | void ata_pci_bmdma_init(struct ata_host *host) |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3201 | { |
| 3202 | struct device *gdev = host->dev; |
| 3203 | struct pci_dev *pdev = to_pci_dev(gdev); |
| 3204 | int i, rc; |
| 3205 | |
| 3206 | /* No BAR4 allocation: No DMA */ |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3207 | if (pci_resource_start(pdev, 4) == 0) { |
| 3208 | ata_bmdma_nodma(host, "BAR4 is zero"); |
| 3209 | return; |
| 3210 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3211 | |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3212 | /* |
| 3213 | * Some controllers require BMDMA region to be initialized |
| 3214 | * even if DMA is not in use to clear IRQ status via |
| 3215 | * ->sff_irq_clear method. Try to initialize bmdma_addr |
| 3216 | * regardless of dma masks. |
| 3217 | */ |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3218 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); |
| 3219 | if (rc) |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3220 | ata_bmdma_nodma(host, "failed to set dma mask"); |
| 3221 | if (!rc) { |
| 3222 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); |
| 3223 | if (rc) |
| 3224 | ata_bmdma_nodma(host, |
| 3225 | "failed to set consistent dma mask"); |
| 3226 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3227 | |
| 3228 | /* request and iomap DMA region */ |
| 3229 | rc = pcim_iomap_regions(pdev, 1 << 4, dev_driver_string(gdev)); |
| 3230 | if (rc) { |
Tejun Heo | c708765 | 2010-05-10 21:41:34 +0200 | [diff] [blame] | 3231 | ata_bmdma_nodma(host, "failed to request/iomap BAR4"); |
| 3232 | return; |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3233 | } |
| 3234 | host->iomap = pcim_iomap_table(pdev); |
| 3235 | |
| 3236 | for (i = 0; i < 2; i++) { |
| 3237 | struct ata_port *ap = host->ports[i]; |
| 3238 | void __iomem *bmdma = host->iomap[4] + 8 * i; |
| 3239 | |
| 3240 | if (ata_port_is_dummy(ap)) |
| 3241 | continue; |
| 3242 | |
| 3243 | ap->ioaddr.bmdma_addr = bmdma; |
| 3244 | if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) && |
| 3245 | (ioread8(bmdma + 2) & 0x80)) |
| 3246 | host->flags |= ATA_HOST_SIMPLEX; |
| 3247 | |
| 3248 | ata_port_desc(ap, "bmdma 0x%llx", |
| 3249 | (unsigned long long)pci_resource_start(pdev, 4) + 8 * i); |
| 3250 | } |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3251 | } |
| 3252 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_init); |
| 3253 | |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 3254 | /** |
| 3255 | * ata_pci_bmdma_prepare_host - helper to prepare PCI BMDMA ATA host |
| 3256 | * @pdev: target PCI device |
| 3257 | * @ppi: array of port_info, must be enough for two ports |
| 3258 | * @r_host: out argument for the initialized ATA host |
| 3259 | * |
| 3260 | * Helper to allocate BMDMA ATA host for @pdev, acquire all PCI |
| 3261 | * resources and initialize it accordingly in one go. |
| 3262 | * |
| 3263 | * LOCKING: |
| 3264 | * Inherited from calling layer (may sleep). |
| 3265 | * |
| 3266 | * RETURNS: |
| 3267 | * 0 on success, -errno otherwise. |
| 3268 | */ |
| 3269 | int ata_pci_bmdma_prepare_host(struct pci_dev *pdev, |
| 3270 | const struct ata_port_info * const * ppi, |
| 3271 | struct ata_host **r_host) |
| 3272 | { |
| 3273 | int rc; |
| 3274 | |
| 3275 | rc = ata_pci_sff_prepare_host(pdev, ppi, r_host); |
| 3276 | if (rc) |
| 3277 | return rc; |
| 3278 | |
| 3279 | ata_pci_bmdma_init(*r_host); |
| 3280 | return 0; |
| 3281 | } |
| 3282 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_prepare_host); |
| 3283 | |
| 3284 | /** |
| 3285 | * ata_pci_bmdma_init_one - Initialize/register BMDMA PCI IDE controller |
| 3286 | * @pdev: Controller to be initialized |
| 3287 | * @ppi: array of port_info, must be enough for two ports |
| 3288 | * @sht: scsi_host_template to use when registering the host |
| 3289 | * @host_priv: host private_data |
| 3290 | * @hflags: host flags |
| 3291 | * |
| 3292 | * This function is similar to ata_pci_sff_init_one() but also |
| 3293 | * takes care of BMDMA initialization. |
| 3294 | * |
| 3295 | * LOCKING: |
| 3296 | * Inherited from PCI layer (may sleep). |
| 3297 | * |
| 3298 | * RETURNS: |
| 3299 | * Zero on success, negative on errno-based value on error. |
| 3300 | */ |
| 3301 | int ata_pci_bmdma_init_one(struct pci_dev *pdev, |
| 3302 | const struct ata_port_info * const * ppi, |
| 3303 | struct scsi_host_template *sht, void *host_priv, |
| 3304 | int hflags) |
| 3305 | { |
Bartlomiej Zolnierkiewicz | c203603 | 2011-10-11 19:22:16 +0200 | [diff] [blame] | 3306 | return ata_pci_init_one(pdev, ppi, sht, host_priv, hflags, 1); |
Tejun Heo | 1c5afdf | 2010-05-19 22:10:22 +0200 | [diff] [blame] | 3307 | } |
| 3308 | EXPORT_SYMBOL_GPL(ata_pci_bmdma_init_one); |
| 3309 | |
Tejun Heo | 9f2f721 | 2010-05-10 21:41:32 +0200 | [diff] [blame] | 3310 | #endif /* CONFIG_PCI */ |
Tejun Heo | 9a7780c | 2010-05-19 22:10:24 +0200 | [diff] [blame] | 3311 | #endif /* CONFIG_ATA_BMDMA */ |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3312 | |
| 3313 | /** |
| 3314 | * ata_sff_port_init - Initialize SFF/BMDMA ATA port |
| 3315 | * @ap: Port to initialize |
| 3316 | * |
| 3317 | * Called on port allocation to initialize SFF/BMDMA specific |
| 3318 | * fields. |
| 3319 | * |
| 3320 | * LOCKING: |
| 3321 | * None. |
| 3322 | */ |
| 3323 | void ata_sff_port_init(struct ata_port *ap) |
| 3324 | { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3325 | INIT_DELAYED_WORK(&ap->sff_pio_task, ata_sff_pio_task); |
Tejun Heo | 5fe7454 | 2010-05-10 21:41:37 +0200 | [diff] [blame] | 3326 | ap->ctl = ATA_DEVCTL_OBS; |
| 3327 | ap->last_ctl = 0xFF; |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3328 | } |
| 3329 | |
| 3330 | int __init ata_sff_init(void) |
| 3331 | { |
Tejun Heo | 6370a6a | 2010-10-11 15:12:27 +0200 | [diff] [blame] | 3332 | ata_sff_wq = alloc_workqueue("ata_sff", WQ_MEM_RECLAIM, WQ_MAX_ACTIVE); |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3333 | if (!ata_sff_wq) |
| 3334 | return -ENOMEM; |
| 3335 | |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3336 | return 0; |
| 3337 | } |
| 3338 | |
Luck, Tony | c43d559 | 2010-08-23 13:18:02 -0700 | [diff] [blame] | 3339 | void ata_sff_exit(void) |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3340 | { |
Tejun Heo | c429137 | 2010-05-10 21:41:38 +0200 | [diff] [blame] | 3341 | destroy_workqueue(ata_sff_wq); |
Tejun Heo | 270390e | 2010-05-10 21:41:35 +0200 | [diff] [blame] | 3342 | } |